| ESS | empty sella syndrome; endostreptosin; erythrocyte-sensitizing substance; euthyroid sick syndrome; ev... |
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| E-sub | excitor substance |
| FMS | fat-mobilizing substance; Fellow of the Medical Society; fibromyalgia syndrome; full mouth series |
| FRS | Fellow of the Royal Society; ferredoxin-reducing substance; first rank symptom; furosemide |
| GSS | gamete-shedding substance; General Social Survey; Gerstmann-Straussler-Scheinker [disease] |
low blood pressure
| group test | In psychology, a test designed to be administered to more than one individual at a time; e.g., scholastic achievement test, medical college admissions test. (05 Mar 2000) |
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| group transfer | The transfer of a functional moiety from one molecule to another. (05 Mar 2000) |
| group translocation | A process of actively importing compounds into the bacterial cell. The compound diffuses into the cell passively, and is immediately modified (for example by phosphorylation) so that it cannot diffuse back out. (09 Oct 1997) |
| group velocity | <radiobiology> This is derived from the dispersion relation as Vgroup = dw/dk, the group velocity is the rate at which modulations or information within a wave travel through a given medium. (09 Oct 1997) |
| methyl group | A -CH3 group on a larger molecule. A carbon which is single-bonded to three hydrogens, and has one free bond to the rest of the molecule. (09 Oct 1997) |
| middle group of mesenteric lymph nodes | The mesenteric lymph nodes located along the intestinal (jejunal and ileal) branches of the superior mesenteric artery. Synonym: nodi lymphatici superiores centrales, central mesenteric lymph nodes. (05 Mar 2000) |
| phosphate group | <chemistry> A phosphate group on a larger molecule, where the phosphorus is single bonded to each of the four oxygens, and the other bond of one of the oxygens is attached to the rest of the molecule. This means that the entire group has a net negative charge of -3 (from the free second bonds on the oxygen atoms which are only bonded to the phosphorus atom). Often hydrogen atoms will be attached to the oxygens and sometimes double bonds between the phosphorus and an oxygen are present. (31 Dec 1997) |
| clinical cooperative group | A group of medical institutions cooperating to perform clinical research. (16 Dec 1997) |
| collective group | <zoology> An aggregate of related species of which the generic position is uncertain. According to the Code, for the sake of taxonomic convenience, may be treated as a genus. Such a collective group does not require a type species. Assignment to a collective group is a temporary, convenient, identifying label. (09 Jan 1998) |
| collective-group name | 1. A name established expressly for a collective group. 2. A name established for a nominal genus or subgenus and later used for a collective group. (09 Jan 1998) |
| wenlock group | <geology> The middle subdivision of the Upper Silurian in Great Britain; so named from the typical locality in Shropshire. Source: Websters Dictionary (01 Mar 1998) |
| compatibility group | <molecular biology> A group of plasmids (rings of DNA) which is able to coexist in the same cell with another plasmid from a different group. (05 Jan 1998) |
| platinum group | A group of six amphoteric elements: iridium, osmium, palladium, platinum, rhodium, and ruthenium. (05 Mar 2000) |
| connective tissue group | <physiology> A collective name for mucous tissue, dentin, bone, cartilage, and ordinary connective tissue, all derived from the mesenchyme. (05 Mar 2000) |
| control group | A group of subjects participating in the same experiment as another group of subjects, but which is not exposed to the variable under investigation. See: experimental group. (05 Mar 2000) |