| heptane | <chemistry> Any one of several isometric hydrocarbons, C7H16, of the paraffin series (nine are possible, four are known); so called because the molecule has seven carbon atoms. Specifically, a colourless liquid, found as a constituent of petroleum, in the tar oil of cannel coal, etc. Origin: Gr. "epta seven. Source: Websters Dictionary (01 Mar 1998) |
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| heptanes | Seven-carbon saturated hydrocarbon group of the methane series. Include isomers and derivatives. (12 Dec 1998) |
| heptanoates | Salts and esters of the 7-carbon saturated monocarboxylic acid heptanoic acid. (12 Dec 1998) |
| heptanoic acids | 7-carbon saturated monocarboxylic acids. (12 Dec 1998) |
| heptanol | <chemical> A colourless liquid with a fragrant odour. It is used as an intermediate, solvent and in cosmetics. Chemical name: 1-Heptanol (12 Dec 1998) |
| heptapeptide | A peptide containing seven amino acids. (05 Mar 2000) |
| heptaphyllous | <botany> Having seven leaves. Origin: Hepta- + Gr. Leaf: cf. F. Heptaphylle. Source: Websters Dictionary (01 Mar 1998) |
| heptarchist | A ruler of one division of a heptarchy. Alternative forms: heptarch. Source: Websters Dictionary (01 Mar 1998) |
| heptaspermous | <botany> Having seven seeds. Origin: Hepta- + Gr. A seed. Source: Websters Dictionary (01 Mar 1998) |
| heptavalent | <chemistry> Having seven units of attractive force or affinity; said of heptad elements or radicals. Origin: Hepta- + L. Valens, p. Pr. See Valence. Source: Websters Dictionary (01 Mar 1998) |
| heptene | <chemistry> Same as Heptylene. Origin: Gr. "epta seven. Source: Websters Dictionary (01 Mar 1998) |
| heptine | <chemistry> Any one of a series of unsaturated metameric hydrocarbons, C7H12, of the acetylene series. Origin: Heptane + -ine. Source: Websters Dictionary (01 Mar 1998) |
| heptoic | <chemistry> Pertaining to, or derived from, heptane; as, heptoic acid. Source: Websters Dictionary (01 Mar 1998) |
| heptone | <chemistry> A liquid hydrocarbon, C7H10, of the valylene series. Origin: Gr. "epta seven. Source: Websters Dictionary (01 Mar 1998) |
| heptose | A sugar with seven carbon atoms in its molecule; e.g., sedoheptulose. (05 Mar 2000) |