| heptulose | A seven-carbon sugar possessing a ketone group. Synonym: heptulose. (05 Mar 2000) |
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| heptyl | <chemistry> A compound radical, C7H15, regarded as the essential radical of heptane and a related series of compounds. Origin: Hepta- + -yl. Source: Websters Dictionary (01 Mar 1998) |
| heptylene | <chemistry> A colourless liquid hydrocarbon, C7H14, of the ethylene series; also, any one of its isomers. Synonym: heptene. Source: Websters Dictionary (01 Mar 1998) |
| heptylic | <chemistry> Pertaining to, or derived from, heptyl or heptane; as, heptylic alcohol. Cf. Oenanthylic. Source: Websters Dictionary (01 Mar 1998) |