| labdanum | <botany> See Ladanum. Source: Websters Dictionary (01 Mar 1998) |
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| label | 1. To incorporate into a compound a substance that is readily detected, such as a radionuclide, whereby its metabolism can be followed or its physical distribution detected. 2. The substance so incorporated. (05 Mar 2000) |
| labelled atom | A radioactive atom, or a stable but rare one, which by its presence in a molecule helps localization or measurement of that molecule. Synonym: tagged atom. (05 Mar 2000) |
| labelled thyroxine | Thyroxine in which a radioisotope of iodine (125I or 131I) is incorporated into its molecule; used in experiments tracing the metabolism of thyroxine. Synonym: labelled thyroxine, radiolabelled thyroxine, radiothyroxin. (05 Mar 2000) |
| labellum | A lip, in orchids, the distinctive median petal that serves as an alighting platform for pollinating insects. (09 Oct 1997) |
| labetalol | <chemical> 2-hydroxy-5-(1-hydroxy-2-((1-methyl-3-phenylpropyl)amino) ethyl)benzamide. Blocker of both alpha- and beta-adrenergic receptors that is used as an antihypertensive. Pharmacological action: adrenergic alpha-antagonists, adrenergic beta-antagonists, antihypertensive agents, sympatholytics. Chemical name: Benzamide, 2-hydroxy-5-(1-hydroxy-2-((1-methyl-3-phenylpropyl)amino)ethyl)- (12 Dec 1998) |
| labetalol hydrochloride | 5-[1-Hydroxy-2-[(1-methyl-3-phenylpropyl)amino]ethyl]salicyamide monohydrochloride;an alpha-adrenergic and beta-adrenergic blocking agent used in the treatment of hypertension. (05 Mar 2000) |
| labia | Latin for lips. There are two pairs of labia (lips) at the entrance to the vagina. They are the labia majora (the larger outside pair) and the labia minora (the smaller inside pair). Together they form part of the vulva (the female external genitalia). (12 Dec 1998) |
| labia majora | The larger (major) outside pair of labia (lips) of the vulva (the female external genitalia). (12 Dec 1998) |
| labia minora | The smaller (minor) inside pair of labia (lips) of the vulva (the female external genitalia). (12 Dec 1998) |
| labia oris | Lips of the mouth. Synonym: labia oris. (05 Mar 2000) |
| labia uteri | See: anterior lip of uterine os, posterior lip of uterine os. Vestibular labium of limbus of spiral lamina, the upper, short periosteal extension of the limbus laminae spiralis osseae which provides the central attachment for the tectorial membrane. Synonym: labium limbi vestibulare laminae spiralis, lamina dentata, vestibular lip of limbus of spiral lamina. (05 Mar 2000) |
| labial | <dentistry> The tooth surface next to your lips or things mounted on the tooth surfaces next to your lips. (08 Jan 1998) |
| labial arch | An orthodontic arch wire that approximates the labial surfaces of the teeth. (05 Mar 2000) |
| labial bar | A major connector located labial to the dental arch joining two or more bilateral parts of a mandibular removable partial denture. (05 Mar 2000) |