What's the difference between cover and crust?

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.

Crust


Definition:

  • (n.) The hard external coat or covering of anything; the hard exterior surface or outer shell; an incrustation; as, a crust of snow.
  • (n.) The hard exterior or surface of bread, in distinction from the soft part or crumb; or a piece of bread grown dry or hard.
  • (n.) The cover or case of a pie, in distinction from the soft contents.
  • (n.) The dough, or mass of doughy paste, cooked with a potpie; -- also called dumpling.
  • (n.) The exterior portion of the earth, formerly universally supposed to inclose a molten interior.
  • (n.) The shell of crabs, lobsters, etc.
  • (n.) A hard mass, made up of dried secretions blood, or pus, occurring upon the surface of the body.
  • (n.) An incrustation on the interior of wine bottles, the result of the ripening of the wine; a deposit of tartar, etc. See Beeswing.
  • (n.) To cover with a crust; to cover or line with an incrustation; to incrust.
  • (v. i.) To gather or contract into a hard crust; to become incrusted.

Example Sentences:

  • (1) In certain cases the ulcerous crust is removed with chloramine.
  • (2) A rapid evolution of epithelialization was found in case of treated animals as distinguished from control sample, where the infected crust was far from being healed.
  • (3) Future ice loss and bending of the crust due to rising sea levels have the potential ultimately to raise levels of both earthquake and volcanic activity.
  • (4) A search for an intact blister is always warranted when erosions, oozing, or crusts are noted.
  • (5) In general, healthy panelists evaluated the cakes as sweeter, crust bitterness as greater, and overall eating quality as higher than the panel members with carbohydrate metabolic disorders.
  • (6) The tanks fell from 2,000ft on to the salt crust of the open desert and burst open as they struck the ground.
  • (7) A negative correlation between the number of mites and the presence and extensiveness of crusts was observed.
  • (8) The presence of subcorneal pustules in a solitary, indolent, crusted plaque, or in erythema annulare-like lesions with a trailing scale, is evidence of atypical psoriasis.
  • (9) Requirements for intranasal douching with saline have varied; however, we have had no problems with bothersome crusting following b.i.d.
  • (10) Disadvantages are a longer healing period and temporary crust formation as in conchotomy, the high technical effort and cost of the laser.
  • (11) Crusting was found around the lashes, and the lids developed loss of lashes and hair.
  • (12) Within three weeks after treatment was initiated, all animals were free of crusts.
  • (13) After the crust falls, carrying away some tattoo pigment on its deeper surface, a pale-pink scar forms, then gradually fades in several months.
  • (14) We report a case of nonvesicular hydroa vacciniforme in which only extensive crusting associated with hypertrophic scarring on sun-exposed skin was present.
  • (15) The absorption of mercury was investigated after three phase crusting by Grob on a second-degree scald burn of 10 to 15% of the body surface in rats.
  • (16) For oxalate stones a separation of the outer layer (crust) from the inner layer (core) marked the point of maximum load.
  • (17) The vesicles progress to pustules, then to crusts that eventually are lost.
  • (18) A case of localized CrS appearing as a yellowish and crusted plaque on the second right toe is reported in a woman with AIDS.
  • (19) All the patients were elderly women who developed chronic, extensive, pustular, crusted and occasionally eroded lesions of the scalp which produced scarring alopecia.
  • (20) For all their apparent beauty and fragility, just think of coral reefs as big lumps of rock with a living crust.