| thigh bone | <anatomy> The large bone in the thigh that articulates with the pelvis above and the knee below. (27 Sep 1997) |
|---|---|
| thigh joint | The ball-and-socket synovial joint between the head of the femur and the acetabulum. Synonym: articulatio coxae, coxa, thigh joint. (05 Mar 2000) |
| thigmesthesia | Sensibility to touch. Origin: G. Thigma, touch, + aisthesis, sensation (05 Mar 2000) |
| thigmotropism | A movement toward or away from a touch stimulus on the part of a portion of an organism, such as leaves or tendrils. Compare: thigmotaxis. Origin: G. Thigma, touch, + trope, a turning (05 Mar 2000) |
| thill | 1. One of the two long pieces of wood, extending before a vehicle, between which a horse is hitched; a shaft. 2. <chemical> The floor of a coal mine. Thill coupling, a device for connecting the thill of a vehicle to the axle. Origin: OE. Thille, AS. Ille a board, plank, beam, thill; akin to el a plank, D. Deel a plank, floor, G. Diele, OHG. Dili, dilla, Icel. Ilja a plank, planking, a thwart, ili a wainscot, plank; cf. Skr. Tala a level surface. 236. Cf. Fill a thill, Deal a plank. Source: Websters Dictionary (01 Mar 1998) |
| thimble | 1. A kind of cap or cover, or sometimes a broad ring, for the end of the finger, used in sewing to protect the finger when pushing the needle through the material. It is usually made of metal, and has upon the outer surface numerous small pits to catch the head of the needle. 2. <mechanics> Any thimble-shaped appendage or fixure. Specifically: A tubular piece, generally a strut, through which a bolt or pin passes. A fixed or movable ring, tube, or lining placed in a hole. A tubular cone for expanding a flue; called ferrule in England. 3. A ring of thin metal formed with a grooved circumference so as to fit within an eye-spice, or the like, and protect it from chafing. Origin: OE. Thimbil, AS. Mel, fr. Ma a thumb. 56. See Thumb. Source: Websters Dictionary (01 Mar 1998) |
| thimbleberry | <botany> A kind of black raspberry (Rubus occidentalis), common in America. Source: Websters Dictionary (01 Mar 1998) |
| thimbleeye | <zoology> The chub mackerel. See Chub. Source: Websters Dictionary (01 Mar 1998) |
| thimbleweed | <botany> Any plant of the composite genus Rudbeckia, coarse herbs somewhat resembling the sunflower; so called from their conical receptacles. Source: Websters Dictionary (01 Mar 1998) |
| thimerosal | Ethylmercury sodium salt, an antiseptic. (27 Sep 1997) |
| thimet oligopeptidase | <enzyme> Endo-oligopeptidase was EC 3.4.22.19 1989-1992; cl-peptidase was EC 3.4.99.31 1978-1992; thiol-dependent metalloproteinase which cleaves bonds with hydrophobic residues at p1, p2 and p3' and a small residue at p1' in substrates with 5-15 residues Registry number: EC 3.4.24.15 Synonym: pz-peptidase b, pz-peptidase a, pz-peptidase, endo-oligopeptidase, proenkephalin converting enzyme, endo-oligopeptidase a, endopeptidase a, enkephalin-converting enzyme, endooligopeptidase a, endopeptidase 22.19, soluble metallo-endopeptidase, endopeptidase 24.15, thimet peptidase, tissue-endopeptidase degrading collagenase-synthetic substrate, cl-peptidase, metalloendopeptidase 24.15, zinc endopeptidase 24-15, endopeptidase 3.4.24.15 (26 Jun 1999) |
| thin | Not thickly or closely; in a seattered state; as, seed sown thin. "Spain is thin sown of people." (Bacon) 1. Having little thickness or extent from one surface to its opposite; as, a thin plate of metal; thin paper; a thin board; a thin covering. 2. Rare; not dense or thick; applied to fluids or soft mixtures; as, thin blood; thin broth; thin air. "In the day, when the air is more thin." (Bacon) "Satan, bowing low His gray dissimulation, disappeared, Into thin air diffused." (Milton) 3. Not close; not crowded; not filling the space; not having the individuals of which the thing is composed in a close or compact state; hence, not abundant; as, the trees of a forest are thin; the corn or grass is thin. "Ferrara is very large, but extremely thin of people." (Addison) 4. Not full or well grown; wanting in plumpness. "Seven thin ears . . . Blasted with the east wind." (Gen. Xli. 6) 5. Not stout; slim; slender; lean; gaunt; as, a person becomes thin by disease. 6. Wanting in body or volume; small; feeble; not full. "Thin, hollow sounds, and lamentable screams." (Dryden) 7. Slight; small; slender; flimsy; wanting substance or depth or force; superficial; inadequate; not sufficient for a covering; as, a thin disguise. "My tale is done, for my wit is but thin." (Chaucer) Thin is used in the formation of compounds which are mostly self-explaining; as, thin-faced, thin-lipped, thin-peopled, thin-shelled, and the like. Thin section. See Section. Origin: OE. Thinne, thenne, thunne, AS. Thynne; akin to D. Dun, G. Dunn, OHG. Dunni, Icel. Thunnr, Sw. Tunn, Dan. Tynd, Gael. & Ir. Tana, W. Teneu, L. Tenuis, Gr. (in comp) stretched out, stretched, stretched out, long, Skr. Tanu thin, slender; also to AS. Enian to extend, G. Dehnen, Icel. Enja, Goth. Anjan (in comp), L. Tendere to stretch, tenere to hold, Gr. To stretch, Skr. Tan. 51 & 237. Cf. Attenuate, Dance, Tempt, Tenable, Tend to move, Tenous, Thunder, Tone. Source: Websters Dictionary (01 Mar 1998) |
| thin filament | Filaments 7-9nm diameter attached to the Z discs of striated muscle, have opposite polarity in each half sarcomere. Built of F actin with associated tropomyosin and troponin. (18 Nov 1997) |
| thin film | <radiobiology> Plasmas are often used to deposit thin-film coatings on various materials. (09 Oct 1997) |
| thin layer chromatography | <technique> Chromatography using a thin layer of powdered medium on an inert sheet to support the stationary phase. Faster than paper chromatography, gives higher resolution and requires smaller samples. (18 Nov 1997) |