| FT | Fallot tetralogy; false transmitter; family therapy; fast twitch; fatigue trial; fibrous tissue; fin... |
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| MTA | malignant teratoma, anaplastic; medical technical assistant; medical technology assessment; metatars... |
| ST | esotropia; scala tympani; scaphotrapezoid; sclerotherapy; sedimentation time; semitendinosus; sensor... |
| STF | serum thymus factor; slow-twitch fiber; special tube feeding; specialized treatment center; stefin; ... |
| TM | technology management; tectorial membrane; temperature by mouth; temporalis muscle; temporomandibula... |
| LID | Levodopa-induced dyskinesia |
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| LID | Lidocaine |
| LID | low iodide diet |
| F.T. | Fast Twitch |
| FG | Fast-twitch glycolytic |
| twitch | 1. The act of twitching; a pull with a jerk; a short, sudden, quick pull; as, a twitch by the sleeve. 2. A short, spastic contraction of the fibres or muscles; a simple muscular contraction; as, convulsive twitches; a twitch in the side. 3. <veterinary> A stick with a hole in one end through which passes a loop, which can be drawn tightly over the upper lip or an ear of a horse. By twisting the stick the compression is made sufficiently painful to keep the animal quiet during a slight surgical operation. Source: Websters Dictionary (01 Mar 1998) |
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| twitch grass | <botany> See Quitch grass. Source: Websters Dictionary (01 Mar 1998) |
| twitch muscle | <physiology> Striated muscle innervated by a single motoneuron and having an electrically excitable membrane that exhibits an all or none response (c.f. Tonic muscle): in mammals almost all skeletal muscles are twitch muscles. Physiologists often divide muscles into fast and slow twitch types, the fast twitch muscles being associated with fast motor units. (18 Nov 1997) |
| Collier's tucked lid sign | <clinical sign> Unilateral or bilateral lid retraction due to midbrain lesion; occurring at any age. See: setting sun sign, Epstein's sign. Synonym: Collier's tucked lid sign. (05 Mar 2000) |
| nose-bridge-lid reflex | Contraction of the orbicularis oculi muscles upon tapping the margin of the orbit, or the bridge or tip of the nose. Synonym: nose-bridge-lid reflex, nose-eye reflex. (05 Mar 2000) |
| upper lid | The superior, larger and more mobile of the two eyelids which covers most of the anterior surface of the eyeball, including the cornea, when closed; a portion of the lacrimal gland and the aponeurosis of the levator palpebrae superioris muscle extend into it, the muscle opening the closed eye and providing additional elevation when the gaze is directed upward. Synonym: palpebra superior, upper lid. (05 Mar 2000) |
| lid | 1. That which covers the opening of a vessel or box, etc.; a movable cover; as, the lid of a chest or trunk. 2. The cover of the eye; an eyelid. "Tears, big tears, gushed from the rough soldier's lid." (Byron) 3. <botany> The cover of the spore cases of mosses. A calyx which separates from the flower, and falls off in a single piece, as in the Australian Eucalypti. The top of an ovary which opens transversely, as in the fruit of the purslane and the tree which yields Brazil nuts. Origin: AS. Hlid, fr. Hlidan (in comp) to cover, shut; akin to OS. Hlidan (in comp), D. Lid, OHG. Hlit, G. Augenlid eyelid, Icel. Hli gate, gateway. Source: Websters Dictionary (01 Mar 1998) |
| lid-closure reaction | A constriction of both pupils when an effort is made to close eyelids forcibly held apart. A variant of the pupil response to near vision. Synonym: Galassi's pupillary phenomenon, Gifford's reflex, lid-closure reaction, orbicularis phenomenon, orbicularis pupillary reflex, Piltz sign, Westphal's pupillary reflex, Westphal-Piltz phenomenon. (05 Mar 2000) |
| lid crutch spectacles | Spectacles with little offsets of metal with smooth edges which engage above the upper eyelid and keep it raised above the pupil in cases of paralytic blepharoptosis. Synonym: Masselon's spectacles. (05 Mar 2000) |
| lid reflex | A contraction of the eyelids when the cornea is lightly touched with a camel-hair pencil. Synonym: lid reflex. Reflection of light from the surface of the cornea. (05 Mar 2000) |
| lower lid | The inferior, smaller and less mobile of the two eyelids; a check ligament from the inferior rectus muscle extends into it, pulling the lid inferiorly when the gaze is directed downward. Synonym: palpebra inferior, lower lid. (05 Mar 2000) |
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