What's the difference between covering and underlay?

Covering


Definition:

  • (p. pr. & vb. n.) of Cover
  • (n.) Anything which covers or conceals, as a roof, a screen, a wrapper, clothing, etc.

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.

Underlay


Definition:

  • (v. t.) To lay beneath; to put under.
  • (v. t.) To raise or support by something laid under; as, to underlay a cut, plate, or the like, for printing. See Underlay, n., 2.
  • (n.) To put a tap on (a shoe).
  • (v. i.) To incline from the vertical; to hade; -- said of a vein, fault, or lode.
  • (n.) The inclination of a vein, fault, or lode from the vertical; a hade; -- called also underlie.
  • (n.) A thickness of paper, pasteboard, or the like, placed under a cut, or stereotype plate, or under type, in the from, to bring it, or any part of it, to the proper height; also, something placed back of a part of the tympan, so as to secure the right impression.

Example Sentences:

  • (1) After about 3 weeks of culture, N-ethyl-N-nitrosourea-pretreated fetal rat brain cells showed focal proliferation of neural cells on an underlayer of flat, epithelioid cells.
  • (2) These in vitro findings probably account for the remarkable results obtained in infections which up to now had mortality rates of 30 to 60 per cent, depending on the patient's underlaying condition.
  • (3) The type I + III collagen underlayer is reorganized when grafted.
  • (4) On the other hand, the alpha blockers might interfere with the ionic mechanisms underlaying the 4-AP effect thus, masking the removal of the noradrenergic control, due to an alpha blockade.
  • (5) The stromal underlayer has the typical morphological structure: its cells are compactly packed in the form of a skein with stromal mechanocytes among them.
  • (6) It is suggested that the motoneuron excitability changes within the interspike interval underlay the relationship between the motoneuron firing rate and effectiveness of the excitatory afferent volley.
  • (7) We report the anatomical and functional results of 156 myringoplasty; 134 with onlay surgical technique and 22 with underlay technique.
  • (8) Repair of the tympanic membrane with an underlay connective tissue graft (fascia in 90%) was successful in 97% of the ears.
  • (9) The small, underlayer scales, which on the flagella are shown to be arranged in 24 rows, number about 350000; larger scales of more complex construction number about 20 000.
  • (10) On pathological basis (simple, purulent and cholestéatomatous otitis) they used the overlay or the underlay method.
  • (11) A circus movement with antegrad conduction through the AV node and retograde conduction through an accessory pathway was found as the underlaying mechanism of the tachycardia.
  • (12) Flat cytoplasmic extensions of squamous cells underlay most of the goblet cell basal pole which therefore had only a small area on the basal lamina.
  • (13) In arterial walls collagen type III was detected immediately underlaying the endothelial cell layer and in the tissue between tunica elastica interna and adventitia.
  • (14) After dividing the posterior anulus, the flaps are rotated anteriorly, a maneuver that provides ample exposure of the middle ear and greatly simplifies underlay fascia grafting.
  • (15) In double soft-agar culture, colony formations of cancer cells in the overlayer were stimulated or inhibited by the presence of various kinds of fibroblast in the underlayer.
  • (16) Charged £2,339 in September 2005 for supply and fitting of "magnolia cavalier cavalace velvet wool carpet with cloud and cumulus underlay".
  • (17) These facts do not contradict our previous suggestion that the lipid-protein interactions underlay the regulative action mechanism of the natural bioactive ligands.
  • (18) The colony-stimulating activity of unfractionated conditioned medium was equivalent to the activity of standard peripheral blood underlayers.
  • (19) Transmural infarction underlay each case of ruptured ventricular septum, while in ruptured papillary muscle 11 of 20 cases showed subendocardial infarction.
  • (20) This problem has been solved by the layering of an intermediate D2O solution under the BSA and subsequent removal of the BSA solution and the underlaying with D2O containing glutaraldehyde.