| thuja | <botany> A genus of evergreen trees, thickly branched, remarkable for the distichous arrangement of their branches, and having scalelike, closely imbricated, or compressed leaves. Alternative forms: thuya See Thyine wood. Thuja occidentalis is the Arbor vitae of the Eastern and Northern United States. T. Gigantea of North-waetern America is a very large tree, there called red cedar, and canoe cedar, and furnishes a useful timber. Thuja oil. Cedar leaf oil. Thujone. N. An oil, C10H16O, the chief constituent of cedar leaf oil. A stimulant similar to camphor. Also called thujol, thuyol, absinthol, thuyone, tanacetol, tanacetone. Origin: NL, from Gr. An African tree with sweet-smelling wood. Source: Websters Dictionary (01 Mar 1998) |
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| thuja oil | Oil obtained by steam distillation from the fresh leaves of Thuja occidentalis; used as an insect repellent and counterirritant, and in perfumery. Synonym: thuja oil. (05 Mar 2000) |
| thujol | C10H16O;the chief constituent of cedar leaf oil; a stimulant similar to camphor. Synonym: absinthol, tanacetol, tanacetone, thujol, thuyol, thuyone. (05 Mar 2000) |
| thujone | C10H16O;the chief constituent of cedar leaf oil; a stimulant similar to camphor. Synonym: absinthol, tanacetol, tanacetone, thujol, thuyol, thuyone. (05 Mar 2000) |
| thule | The name given by ancient geographers to the northernmost part of the habitable world. According to some, this land was Norway, according to others, Iceland, or more probably Mainland, the largest of the Shetland islands; hence, the Latin phrase ultima Thule, farthest Thule. Origin: L. Thule, Thyle, Gr. Source: Websters Dictionary (01 Mar 1998) |
| thulia | <chemistry> Oxide of thulium. Source: Websters Dictionary (01 Mar 1998) |
| thulium | <chemistry> A rare metallic element of uncertain properties and identity, said to have been found in the mineral gadolinite. Origin: NL. See Thule. Source: Websters Dictionary (01 Mar 1998) |
| thumb | The first digit on the radial side of the hand. Synonym: digitus primus, pollex, first finger. Origin: A.S. Thuma (05 Mar 2000) |
| thumb forceps | A spring forceps used by compression with thumb and forefinger. (05 Mar 2000) |
| thumb fractures | <radiology> Base of 1st metacarpal, Bennett ULNAR side, Rolando RADIAL side (mnemonic R=R), base of 1st proximal phalanx, Gamekeeper avulsion fracture (12 Dec 1998) |
| thumb lancet | A lancet with short flat blade which folds back, when closed, between two plates of the handle. (05 Mar 2000) |
| thumb reflex | Flexion of the thumb upon tapping the dorsum of the hand. Synonym: metacarpothenar reflex. (05 Mar 2000) |
| thumbprinting | A radiographic sign of intestinal ischemia associated with haematoma formation oedema in the bowel wall; the thickened and edematous tissues encroach on the air-or contrast-filled lumen radiographically. (05 Mar 2000) |
| thumps | 1. Spasmodic contractions of the diaphragm, or hiccups, occasionally seen in animals. 2. In swine, a type of irregular jerky breathing seen in swine influenza, in severely anaemic pigs, and in young pigs when ascarid larvae are migrating through the tissues. (05 Mar 2000) |
| thunder | 1. To produce thunder; to sound, rattle, or roar, as a discharge of atmospheric electricity; often used impersonally; as, it thundered continuously. "Canst thou thunder with a voice like him?" (Job xl. 9) 2. To make a loud noise; especially. A heavy sound, of some continuance. "His dreadful voice no more Would thunder in my ears." (Milton) 3. To utter violent denunciation. Origin: AS. Unrian. See Thunder. 1. The sound which follows a flash of lightning; the report of a discharge of atmospheric electricity. 2. The discharge of electricity; a thunderbolt. "The revenging gods 'Gainst parricides did all their thunders bend." (Shak) 3. Any loud noise; as, the thunder of cannon. 4. An alarming or statrling threat or denunciation. "The thunders of the Vatican could no longer strike into the heart of princes." (Prescott) Thunder pumper. <zoology> The chicken, or milk, snake. A small reddish ground snake (Carphophis, or Celuta, amoena) native to the Eastern United States; called also worm snake. Thunder tube, a fulgurite. See Fulgurite. Origin: OE. Under, onder, oner, AS. Unor; akin to unian to stretch, to thunder, D. Donder thunder, G. Donner, OHG. Donar, Icel. Orr Thor, L. Tonare to thunder, tonitrus thunder, Gr. A stretching, straining, Skr. Tan to stretch. 52. See Thin, and cf. Astonish, Detonate, Intone, Thursday, Tone. Source: Websters Dictionary (01 Mar 1998) |