| selective serotonin reuptake inhibitor | <pharmacology> This is a class of drug that are used as antidepressants. Functionally, they increase the levels of serotonin in the body. These drugs can be dangerous if they are mixed with other drugs such as other antidepressants, illicit drugs (LSD, cocaine, methamphetamine), some antihistamines (Seldane, Histmanal), some antibiotics, and calcium channel blockers. Side effects include lethargy, confusion, flushing, sweating and muscle spasms. Overdose can cause damage to red blood cells, breathing problems and kidney damage. Examples include: Prozac, Zoloft and Paxil. Acronym: SSRI (12 Jan 1998) |
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| selective stain | <technique> A stain that colours one portion of a tissue or cell exclusively or more deeply than the remaining portions. (05 Mar 2000) |
| selectivity | <pharmacology> The degree to which a dose of a drug produces the desired effect in relation to adverse effects. (18 Nov 1997) |
| selector gene | <molecular biology> A group of genes that determines which part of a developmental pattern cells will be allocated within a developmental segment. (18 Nov 1997) |
| selegiline | <chemical> A selective, irreversible inhibitor of type b monoamine oxidase. It is used in newly diagnosed patients with parkinson's disease. It may slow progression of the clinical disease and delay the requirement for levodopa therapy. It also may be given with levodopa upon onset of disability. The compound without isomeric designation is deprenyl. Pharmacological action: antiparkinson agents, monoamine oxidase inhibitors, neuroprotective agents. Chemical name: Benzeneethanamine, N,alpha-dimethyl-N-2-propynyl-, (R)- (12 Dec 1998) |
| selenate | <chemistry> A salt of selenic acid; formerly Synonym: seleniate. Source: Websters Dictionary (01 Mar 1998) |
| selenate reductase | <enzyme> Terminal electron acceptor for anaerobic respiration in thauera selenatis; reduces selenate to selenite Registry number: EC 1.97.- (26 Jun 1999) |
| selene unguium | Synonym: lunula. Origin: G. Selene, moon; gen. Pl. Of L. Unguis, nail (05 Mar 2000) |
| selenecentric | <astronomy> As seen or estimated from the center of the moon; with the moon central. Origin: Gr. The moon + E. Centric. Source: Websters Dictionary (01 Mar 1998) |
| selenhydric | <chemistry> Of, pertaining to, or designating, hydrogen selenide, H2Se, regarded as an acid analogous to sulphydric acid. Source: Websters Dictionary (01 Mar 1998) |
| selenic | <chemistry> Of or pertaining to selenium; derived from, or containing, selenium; specifically, designating those compounds in which the element has a higher valence as contrasted with selenious compounds. Origin: Cf. F. Selenique. Source: Websters Dictionary (01 Mar 1998) |
| selenide | <chemistry> A binary compound of selenium, or a compound regarded as binary; as, ethyl selenide. Source: Websters Dictionary (01 Mar 1998) |
| selenio- | <chemistry, prefix> A combining form (also used adjectively) denoting the presence of selenium or its compounds; as, selenio-phosphate, a phosphate having selenium in place of all, or a part, of the oxygen. (29 Oct 1998) |
| selenious | <chemistry> Of, pertaining to, or containing, selenium; specifically, designating those compounds in which the element has a lower valence as contrasted with selenic compounds. Origin: Cf. F. Selenieux. Source: Websters Dictionary (01 Mar 1998) |
| selenite | <chemistry> A salt of selenious acid. <chemical> A variety of gypsum, occuring in transparent crystals or crystalline masses. Origin: L. Selenites, Gr. (sc), from the moon. So called from a fancied resemblance in luster or appearance to the moon. Source: Websters Dictionary (01 Mar 1998) |