| Lichtheim, Ludwig | <person> German physician, 1845-1928. See: Lichtheim's sign, Dejerine-Lichtheim phenomenon. (05 Mar 2000) |
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| lichwale | <botany> The gromwell. Source: Websters Dictionary (01 Mar 1998) |
| lichwort | <botany> An herb, the wall pellitory. See Pellitory. Source: Websters Dictionary (01 Mar 1998) |
| licodione 2'-O-methyltransferase | <enzyme> Involved in biosynthesis of retrochalcone Registry number: EC 2.1.1.65 Synonym: sam licodione 2'-o-methyltransferase, lmt-2', s-adenosyl-l-methionine licodione 2'-o-methyltransferase (26 Jun 1999) |
| licorice | <pharmacology> A substance isolated from the root of the licorice plant. Used traditionally as an anti-inflammatory and liver protectant, glycyrrhizin also is thought to have anti-HIV activity. Possible adverse effects include low potassium levels and high blood pressure. (09 Oct 1997) |
| 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 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) |
| 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) |
| lidase | <enzyme> Russian drug, preparation with hyaluronidase activity Registry number: EC 3.2.1.- (26 Jun 1999) |
| Liddell | Edward G.T., English neurophysiologist, 1895-1981. See: Liddell-Sherrington reflex. (05 Mar 2000) |
| Liddell-Sherrington reflex | Tonic contraction of the muscles in response to a stretching force, due to stimulation of muscle proprioceptors. Synonym: Liddell-Sherrington reflex, muscular reflex, stretch reflex. (05 Mar 2000) |
| lidocaine | <cardiology, drug> A local anaesthetic and cardiac depressant used as an antiarrhythmia agent. Its actions are more intense and its effects more prolonged than those of procaine but its duration of action is shorter than that of bupivacaine or prilocaine. Pharmacological action: anaesthetics, local, anti-arrhythmia agents. Decreases automaticity, depresses conduction in reentrant pathways and may raise fibrillation threshold, especially in combination with bretylium. Uses: The drug of first choice for ventricular arrhythmias, ventricular ectopy, and wide complex tachycardias of unknown origin. Dose: 1-1.5 mg/kg IV bolus, followed by additional 0.5-1.5 mg/kg every 5-10 min to a total of 3 mg/kg. Can be administered via the endotracheal tube. Use 2 to 2.5 times the intravenous dose. Upon return of circulation, use continuous infusion at 2 - 4 mg/min. Reduce the maintenance dose if decreased cardiac output or hepatic failure or more than 70 years of age. Potential complications: dizziness, drowsiness, disorientation, seizures, hypotension - causes vasodilation; myocardial depression at higher concentrations; heart block - only rarely seen with high levels. Chemical name: 2-(diethylamino)-N-(2,6-dimethylphenyl)-acetamide (15 Mar 2000) |
| lidocaine N-deethylase | <enzyme> Catalyzed mainly by cytochrome p-450 3a2 in rat liver microsomes Registry number: EC 1.- (26 Jun 1999) |
| lidoflazine | <chemical> 4-[4,4-bis(p-fluorophenyl)butyl]-1-piperazine aceto-2',6'-xylidine. Coronary vasodilator with some antiarrhythmic action. Pharmacological action: calcium channel blockers, vasodilator agents. Chemical name: 1-Piperazineacetamide, 4-(4,4-bis(4-fluorophenyl)butyl)-N-(2,6-dimethylphenyl)- (12 Dec 1998) |