| isocrymal | <physics> Pertaining to, having the nature of, or illustrating, an isocryme; as, an isocrymal line; an isocrymal chart. Source: Websters Dictionary (01 Mar 1998) |
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| isocryme | <physics> A line connecting points on the earth's surface having the same mean temperature in the coldest month of the year. Origin: Iso- + Gr. Cold. Source: Websters Dictionary (01 Mar 1998) |
| isocyanate | The radical -N==C==O from isocyanic acid. (05 Mar 2000) |
| isocyanates | Organic compounds that contain the -nco radical. (12 Dec 1998) |
| isocyanic | <chemistry> Designating an acid isomeric with cyanic acid. Isocyanic acid, an acid metameric with cyanic acid, and resembling it in its salts. It is obtained as a colourless, mobile, unstable liquid by the heating cyanuric acid. Called technically carbimide. Origin: Iso- + cyanic. Source: Websters Dictionary (01 Mar 1998) |
| isocyanic acid | HNCO;a highly reactive chemical. (05 Mar 2000) |
| isocyanide | The radical -NC; organic isocyanide's are called isonitriles. (05 Mar 2000) |
| isocyanuric | <chemistry> Designating, or pertaining to, an acid isomeric with cyanuric acid, and Synonym: fulminuric acid. See Fulminuric. Origin: Iso- + cyanuric. Source: Websters Dictionary (01 Mar 1998) |
| isocyclic compound | Any compound in which the constituent atoms, or any part of them, form a ring. Used mainly in organic chemistry where: 1) numerous compound's contain rings of carbon atoms (carbocyclic compound's) or carbon atoms plus one or more atoms of other types (heterocyclic compound's), usually nitrogen, oxygen, or sulfur; 2) where the atoms in the ring are all of the same element (homocyclic or isocyclic compound); 3) where the ring is saturated or contains nonconjugated double bonds (alicyclic compound), the compound is similar in properties to the corresponding acyclic compound (e.g., cyclohexane resembles hexane); 4) where the ring contains conjugated double bonds in a closed loop in which there are 4n + 2 (where n is an integer) delocalised π electrons (Huckel's rule) (aromatic compound; e.g., benzene, pyridine), it is more stable than the corresponding saturated ring and exhibits unusual chemical properties characteristic of itself and not of other types of rings or of acyclic compound's. These aromatic compounds have the ability to sustain an induced ring current. Synonym: closed chain compound, ring compound. (05 Mar 2000) |
| isocytolysin | A cytolysin that reacts with the cells of certain other animals of the same species, but not with the cells of the individual that formed the isocytolysin. (05 Mar 2000) |
| isodactylism | Condition in which the fingers or toes are all approximately of equal length. Origin: iso-+ G. Daktylos, finger (05 Mar 2000) |
| isodense | Denoting a tissue having a radiopacity (radiodensity) similar to that of another or adjacent tissue. (05 Mar 2000) |
| isodesmosine | <chemical> 2-(4-amino-4-carboxybutyl)-1-(5-amino-5-carboxypentyl)-3,5-bis(3-amino-3-carboxypropyl)pyridinium. A rare amino acid found in elastin, formed by condensation of four molecules of lysine into a pyridinium ring. Chemical name: Pyridinium, 2-(4-amino-4-carboxybutyl)-1-(5-amino-5-carboxypentyl)-3,5-bis(3-amino-3-carboxypropyl)- (12 Dec 1998) |
| isodiabatic | <physics> Pertaining to the reception or the giving out of equal quantities of heat by a substance. Isodiabatic lines or curves, a pair of lines or curves exhibiting, on a diagram of energy, the law of variation of the pressure and density of a fluid, the one during the lowering, and the other during the raising, of its temperature, when the quantity of heat given out by the fluid during any given stage of the one process is equal to the quantity received during the corresponding stage of the other. Such lines are said to be isodiabatic with respect to each other. Compare Adiabatic. Origin: Iso- + Gr. To pass through. Source: Websters Dictionary (01 Mar 1998) |
| isodiametric | 1. <chemistry> Developed alike in the directions of the several lateral axes; said of crystals of both the tetragonal and hexagonal systems. 2. <botany> Having the several diameters nearly equal; said of the cells of ordinary parenchyma. Origin: Iso- + diametric. Source: Websters Dictionary (01 Mar 1998) |