What's the difference between cover and shell?

Cover


Definition:

  • (v. t.) To overspread the surface of (one thing) with another; as, to cover wood with paint or lacquer; to cover a table with a cloth.
  • (v. t.) To envelop; to clothe, as with a mantle or cloak.
  • (v. t.) To invest (one's self with something); to bring upon (one's self); as, he covered himself with glory.
  • (v. t.) To hide sight; to conceal; to cloak; as, the enemy were covered from our sight by the woods.
  • (v. t.) To brood or sit on; to incubate.
  • (v. t.) To shelter, as from evil or danger; to protect; to defend; as, the cavalry covered the retreat.
  • (v. t.) To remove from remembrance; to put away; to remit.
  • (v. t.) To extend over; to be sufficient for; to comprehend, include, or embrace; to account for or solve; to counterbalance; as, a mortgage which fully covers a sum loaned on it; a law which covers all possible cases of a crime; receipts than do not cover expenses.
  • (v. t.) To put the usual covering or headdress on.
  • (v. t.) To copulate with (a female); to serve; as, a horse covers a mare; -- said of the male.
  • (n.) Anything which is laid, set, or spread, upon, about, or over, another thing; an envelope; a lid; as, the cover of a book.
  • (n.) Anything which veils or conceals; a screen; disguise; a cloak.
  • (n.) Shelter; protection; as, the troops fought under cover of the batteries; the woods afforded a good cover.
  • (n.) The woods, underbrush, etc., which shelter and conceal game; covert; as, to beat a cover; to ride to cover.
  • (n.) The lap of a slide valve.
  • (n.) A tablecloth, and the other table furniture; esp., the table furniture for the use of one person at a meal; as, covers were laid for fifty guests.
  • (v. i.) To spread a table for a meal; to prepare a banquet.

Example Sentences:

  • (1) In a debate in the House of Commons, I will ask Britain, the US and other allies to convert generalised offers of help into more practical support with greater air cover, military surveillance and helicopter back-up, to hunt down the terrorists who abducted the girls.
  • (2) Photograph: Guardian The research also compiled data covered by a wider definition of tax haven, including onshore jurisdictions such as the US state of Delaware – accused by the Cayman islands of playing "faster and looser" even than offshore jurisdictions – and the Republic of Ireland, which has come under sustained pressure from other EU states to reform its own low-tax, light-tough, regulatory environment.
  • (3) The surface of all cells was covered by a fuzzy coat consisting of fine hairs or bristles.
  • (4) Five patients have been examined by defecography before and four after closure of a loop ileostomy performed to cover healing of the pouch and ileoanal anastomoses.
  • (5) A failure to reach a solution would potentially leave 200,000 homes without affordable cover, leaving owners unable to sell their properties and potentially exposing them to financial hardship.
  • (6) It was an artwork that fired the imaginations of 2 million visitors who played with, were provoked by and plunged themselves into the curious atmosphere of The Weather Project , with its swirling mist and gigantic mirrors that covered the hall's ceiling.
  • (7) But because current donor contributions are not sufficient to cover the thousands of schools in need of security, I will ask in the commons debate that the UK government allocates more.
  • (8) The degree of infection and incidence of different genera covering the same period were identical in both series.
  • (9) At first it looked as though the winger might have shown too much of the ball to the defence, yet he managed to gain a crucial last touch to nudge it past Phil Jones and into the path of Jerome, who slipped Chris Smalling’s attempt at a covering tackle and held off Michael Carrick’s challenge to place a shot past an exposed De Gea.
  • (10) The Sports Network broadcasts live NHL, Nascar, golf and horse racing – having also recently purchased the rights for Formula One – and will show 154 of the 196 games that NBC will cover.
  • (11) As to complications they recorded in one case mucosal bleeding after gastrofiberoptic polypectomy and in one case a covered perforation of the sigmoid at the site of colonoscopic polypectomy.
  • (12) The pressure is ramping up on Asda boss Andy Clarke, who next week will reveal the chain’s sales performance for the quarter covering Christmas.
  • (13) This week MediaGuardian 25, our survey of Britain's most important media companies, covering TV, radio, newspapers, magazines, music and digital, looks at BSkyB.
  • (14) When allegations of systemic doping and cover-ups first emerged in the runup to the 2013 Russian world athletics championships, an IOC spokesman insisted: “Anti-doping measures in Russia have improved significantly over the last five years with an effective, efficient and new laboratory and equipment in Moscow.” London Olympics were sabotaged by Russia’s doping, report says Read more We now know that the head of that lauded Moscow lab, Grigory Rodchenko, admitted to intentionally destroying 1,417 samples in December last year shortly before Wada officials visited.
  • (15) Chapman and the other "illegals" – sleeper agents without diplomatic cover – seem to have done little to harm American national security.
  • (16) This hydrostatic pressure may well be the driving force for creating channels for acid and pepsin to cross the mucus layer covering the mucosal surface.
  • (17) A retrospective study of autopsy-verified fatal pulmonary embolism at a department of infectious diseases was carried out, covering a four-year period (1980-83).
  • (18) Over the same period, breeding in drums dropped from 14%-25% to 4.7%, even though the drums were not treated or covered.
  • (19) The study covered 500 children from Warsaw's primary schools--250 children aged 6-8 years and 250 aged 13-15 years.
  • (20) The smaller interfaces cover about 700 A2 of the subunit surface.

Shell


Definition:

  • (n.) A hard outside covering, as of a fruit or an animal.
  • (n.) The covering, or outside part, of a nut; as, a hazelnut shell.
  • (n.) A pod.
  • (n.) The hard covering of an egg.
  • (n.) The hard calcareous or chitinous external covering of mollusks, crustaceans, and some other invertebrates. In some mollusks, as the cuttlefishes, it is internal, or concealed by the mantle. Also, the hard covering of some vertebrates, as the armadillo, the tortoise, and the like.
  • (n.) Hence, by extension, any mollusks having such a covering.
  • (n.) A hollow projectile, of various shapes, adapted for a mortar or a cannon, and containing an explosive substance, ignited with a fuse or by percussion, by means of which the projectile is burst and its fragments scattered. See Bomb.
  • (n.) The case which holds the powder, or charge of powder and shot, used with breechloading small arms.
  • (n.) Any slight hollow structure; a framework, or exterior structure, regarded as not complete or filled in; as, the shell of a house.
  • (n.) A coarse kind of coffin; also, a thin interior coffin inclosed in a more substantial one.
  • (n.) An instrument of music, as a lyre, -- the first lyre having been made, it is said, by drawing strings over a tortoise shell.
  • (n.) An engraved copper roller used in print works.
  • (n.) The husks of cacao seeds, a decoction of which is often used as a substitute for chocolate, cocoa, etc.
  • (n.) The outer frame or case of a block within which the sheaves revolve.
  • (n.) A light boat the frame of which is covered with thin wood or with paper; as, a racing shell.
  • (v. t.) To strip or break off the shell of; to take out of the shell, pod, etc.; as, to shell nuts or pease; to shell oysters.
  • (v. t.) To separate the kernels of (an ear of Indian corn, wheat, oats, etc.) from the cob, ear, or husk.
  • (v. t.) To throw shells or bombs upon or into; to bombard; as, to shell a town.
  • (v. i.) To fall off, as a shell, crust, etc.
  • (v. i.) To cast the shell, or exterior covering; to fall out of the pod or husk; as, nuts shell in falling.
  • (v. i.) To be disengaged from the ear or husk; as, wheat or rye shells in reaping.

Example Sentences:

  • (1) However, empty shells can also form independently of intact virions.
  • (2) The spikes likely correspond to VP3, a hemagglutinin, while the rest of the mass density in the outer shell represents 780 molecules of VP7, a neutralization antigen.
  • (3) Lead levels in contents and shells of eggs laid by hens dosed with all-lead shot were about twice those in eggs laid by hens dosed with lead-iron shot.
  • (4) We recommend the shell vial technique for isolation of C. burnetii.
  • (5) A significant proportion of the soluble protein of the organic matrix of mollusk shells is composed of a repeating sequence of aspartic acid separated by either glycine or serine.
  • (6) Viral particles in the cultures and the brain were of various sizes and shapes; particles ranged from 70 to over 160 nm in diameter, with a variable position of dense nucleoids and less dense core shells.
  • (7) But we sent out reconnoitres in the morning; we send out a team in advance and they get halfway down the road, maybe a quarter of the way down the road, sometimes three-quarters of the way down the road – we tried this three days in a row – and then the shelling starts and while I can’t point the finger at who starts the shelling, we get the absolute assurances from the Ukraine government that it’s not them.” Flags on all Australian government buildings will be flown at half-mast on Thursday, and an interdenominational memorial service will be held at St Patrick’s cathedral in Melbourne from 10.30am.
  • (8) Unless you are part of some Unite-esque scheme to join up as part of a grand revolutionary plan, why would you bother shelling out for a membership card?
  • (9) Serum levels of lactate dehydrogenase and alkaline phosphatase were considerably elevated in shell-less embryos.
  • (10) The cultivation of embryos in shell-less culture did not affect the normal macroscopic or histological appearance of the membrane, or the rate of proliferation of its constituent cells, as assessed by tritiated thymidine incorporation.
  • (11) Another friend’s sisters told me that the government building where all the students’ records are stored is in an area where there is frequent shelling and air strikes.
  • (12) Shell casings littered the main road, tear gas hung in the air and security forces beat local residents.
  • (13) Carmon Creek is wholly owned by Shell, which said it expected the decision to cost $2bn in its third-quarter results due to impairment, contract provision, redundancy and restructuring charges.
  • (14) A technique for efficient cytochalasin-induced enucleation was used to prepare "karyoplasts"--nuclei surrounded by a thin shell of cytoplasm and an outer cell membrane.
  • (15) The difficulty has been increased with the recent Supreme Court decision which it ruled the Alien Tort Claims Act does not apply outside of the country and dismissed a case against Royal Dutch Shell.
  • (16) We developed a shell vial cell culture assay (SVA) using a cross-reactive monoclonal antibody to the T antigen of simian virus 40 to detect BKV rapidly by indirect immunofluorescence.
  • (17) On second impacts, the GSI rose considerably because the shell and liner of the DH-151 cracked and the suspension of the "141" stretched during the first blow.
  • (18) This coincided with increases in shell thickness and shell porosity as power functions of uterine time.
  • (19) The apoferritin shell is known to assemble spontaneously from its subunits obtained at acid pH upon neutralization.
  • (20) Whereas psammomatous bodies are located within tubules in compressed residual testicular tissue arranged in a shell-like zone around the tumor mass, dystrophic calcifications and bone and cartilage tissues are identified inside the tumor.