What's the difference between seal and shield?

Seal


Definition:

  • (n.) Any aquatic carnivorous mammal of the families Phocidae and Otariidae.
  • (n.) An engraved or inscribed stamp, used for marking an impression in wax or other soft substance, to be attached to a document, or otherwise used by way of authentication or security.
  • (n.) Wax, wafer, or other tenacious substance, set to an instrument, and impressed or stamped with a seal; as, to give a deed under hand and seal.
  • (n.) That which seals or fastens; esp., the wax or wafer placed on a letter or other closed paper, etc., to fasten it.
  • (n.) That which confirms, ratifies, or makes stable; that which authenticates; that which secures; assurance.
  • (n.) An arrangement for preventing the entrance or return of gas or air into a pipe, by which the open end of the pipe dips beneath the surface of water or other liquid, or a deep bend or sag in the pipe is filled with the liquid; a draintrap.
  • (v. t.) To set or affix a seal to; hence, to authenticate; to confirm; to ratify; to establish; as, to seal a deed.
  • (v. t.) To mark with a stamp, as an evidence of standard exactness, legal size, or merchantable quality; as, to seal weights and measures; to seal silverware.
  • (v. t.) To fasten with a seal; to attach together with a wafer, wax, or other substance causing adhesion; as, to seal a letter.
  • (v. t.) Hence, to shut close; to keep close; to make fast; to keep secure or secret.
  • (v. t.) To fix, as a piece of iron in a wall, with cement, plaster, or the like.
  • (v. t.) To close by means of a seal; as, to seal a drainpipe with water. See 2d Seal, 5.
  • (v. t.) Among the Mormons, to confirm or set apart as a second or additional wife.
  • (v. i.) To affix one's seal, or a seal.

Example Sentences:

  • (1) To provide a seal with low pressure-high volume cuffed tubes, cuff sizes of 20.5 mm and 27.5 mm are recommended for female and male patients, respectively.
  • (2) Cermet cement sealings showed defects more frequently.
  • (3) The channels usually ceased conducting within a few minutes after seal formation with the patch pipette and could not be re-activated with depolarizing voltage steps.
  • (4) For all the understandable insistence that parliament and London would continue as normal after Wednesday’s terrorist attack, almost 24 hours later a large section of streets around the area remained sealed off by police.
  • (5) Tone pulses and noise stimuli were mixed acoustically and presented using calibrated, sealed stimulating systems.
  • (6) In general, after recording a baseline tympanogram, mechanically created positive and negative air pressures are created in a hermetically sealed ear canal causing increased pressure on the middle ear air cushion.
  • (7) Ecological evidence is considered to suggest that the rapid maturation of C. semerme in rats may also occur when the parasite becomes established in seals.
  • (8) Increased conversion of 25-OHD to 24,25-(OH)2D and a high capacity for vitamin D storage in their large blubber mass appeared to be factors in the resistance of seals to vitamin D toxicity.
  • (9) The mechanism of sealed-off perforation of the duct is discussed.
  • (10) Membranes were sandwiched between two gas-permeable, plastic foils, placed in a sealed cuvette, and gassed with H2 as reductant or O2 as oxidant.
  • (11) Treatment animals had the anastomoses and graft sealed with a suspension of N-butyl-2-cyanoacrylate and 1.2 g tobramycin powder (antibiotic glue, ANGL) after contamination.
  • (12) The results demonstrated that, when the coronal half of the root canal filling material was removed immediately after placement with pluggers, there was a loss of the apical seal and leakage in thirteen of twenty teeth.
  • (13) Ultrastructural study of the Leydig cells of nonbreeding crabeater, leopard and Ross seals showed that three types of cells could be distinguished.
  • (14) National bans on commercial trading in seal products are already in place in 30 countries including the US, the Netherlands and Italy.
  • (15) Under these conditions, with careful attention to sealing at ankles and waist, it was possible to estimate penetration as low as 0.3%.
  • (16) We used transvitreally delivered cyanoacrylate tissue adhesive to seal retinal breaks in 25 selected patients undergoing vitreous surgery for complicated retinal detachment.
  • (17) To date, numerous products have been evaluated, and many hundreds have received the council's seal of acceptance.
  • (18) She explained that, as a baby, she had been subjected to female genital mutilation (FGM): her clitoris cut off and her vagina sealed, with only a small hole remaining for urine and menstruation.
  • (19) After accidental dissection of the thoracic duct in infants, leakage of chyle could be sealed successfully in 6 cases.
  • (20) These microcapsules can be dried and retain activity when sealed in a jar at 4 degrees C.

Shield


Definition:

  • (n.) A broad piece of defensive armor, carried on the arm, -- formerly in general use in war, for the protection of the body. See Buckler.
  • (n.) Anything which protects or defends; defense; shelter; protection.
  • (n.) Figuratively, one who protects or defends.
  • (n.) In lichens, a Hardened cup or disk surrounded by a rim and containing the fructification, or asci.
  • (n.) The escutcheon or field on which are placed the bearings in coats of arms. Cf. Lozenge. See Illust. of Escutcheon.
  • (n.) A framework used to protect workmen in making an adit under ground, and capable of being pushed along as excavation progresses.
  • (n.) A spot resembling, or having the form of, a shield.
  • (n.) A coin, the old French crown, or ecu, having on one side the figure of a shield.
  • (n.) To cover with, or as with, a shield; to cover from danger; to defend; to protect from assault or injury.
  • (n.) To ward off; to keep off or out.
  • (n.) To avert, as a misfortune; hence, as a supplicatory exclamation, forbid!

Example Sentences:

  • (1) 11 patients with a postoperative classification of stage D had additional external beam radiation to the pelvic and paraaortic lymph nodes with shielding of the implanted prostatic region.
  • (2) An effective gonadal shield should reduce the gonadal dose to a level low enough to preserve spermatogenesis in most patients.
  • (3) Scott was born in North Shields, Tyne and Wear, the youngest of the three sons of Colonel Francis Percy Scott, who served in the Royal Engineers, and his wife, Elizabeth.
  • (4) Fred had to be substituted to shield him from the crowd’s disdain.
  • (5) Was the Dalkon Shield so harmful in the nulliparous woman?
  • (6) Physicians need to prescribe the lowest possible dose of hormones in these women and counsel them to shield their face from sunlight.
  • (7) Moulton said his colleagues were preparing to table an offer next week that will shield 50% of the council's staff from a pay cut.
  • (8) Adult males acclimated to an LD 14:10 photoperiod were distributed in five experimental groups: intact controls (NO), sham-pinealectomized (S), sham-pinealectomized with black plastic shielding of the pineal region, pinealectomized (PX), and pinealectomized with the operated region shielded.
  • (9) In order to evaluate long-term as well as short-term effects, blood loss was measured at postinsertion levels of 6, 12, and 18 months in 72 women wearing the Lippes loop, in 73 wearing the Dalkon shield, and in 82 with TCu 300.
  • (10) Using the outer 2 mm of the skin-fold, and shielding the rest of the hand with a lead plate, cutaneous blood flow rate could be monitored separately.
  • (11) Shielded marrow self renewal capacity, a measurement reflecting primitive hematopoietic stem cell function, remained depressed and did not recover with time.
  • (12) We believe the shield makes the patient more comfortable and decreases the likelihood of dislodgement of the adhesive.
  • (13) He lost contact with his father, a lorry driver, for several years, but says that his mother - aided by his uncle - made it her mission to shield him from the crime and disorder around them.
  • (14) The lead shield encloses only the testes, allowing its use with nearly any radiation field that does not include the testes.
  • (15) "Let us arm ourselves with the weapon of knowledge and let us shield ourselves with unity and togetherness," Malala said.
  • (16) I’m not satisfied until I collect everything' … EFL Cup Europa League International Champions Cup Community Shield Which competition was Ian Rush talking about when he said: 'This is why cup finals are so special, because anyone can beat anyone.
  • (17) Nemanja Matic, more normally such a man-mountain of a midfield shield, is diminished and was beaten too easily in the air by James Morrison for the home side’s second.
  • (18) The results indicate that collagen shields can slowly release cyclosporin A and increase the penetration time for the drug.
  • (19) Shields accepted that the Irish appeared more inclined to send up their grim fiscal situation than go out and riot.
  • (20) Some Coalition MPs raised concerns earlier this year that transparency could expose wealthy business owners to security risks, including kidnapping , and the government prepared legislation to shield private Australian companies.