| huchen | <zoology> A large salmon (Salmo, or Salvelinus, hucho) inhabiting the Danube. Synonym: huso, and bull trout. Origin: G. Source: Websters Dictionary (01 Mar 1998) |
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| Huckel's rule | <chemistry> The number of depolarised electrons in an aromatic ring is equal to 4n + 2 where n is zero or any positive integer; l-tyrosine, l-phenylalanine, l-tryptophan, and l-histidine (when the imidazole ring is deprotonated) obey this rule. (05 Mar 2000) |
| Hucker-Conn stain | <technique> A crystal violet-ammonium oxalate mixture used in Gram's stain. (05 Mar 2000) |
| huckleberry | <botany> The edible black or dark blue fruit of several species of the American genus Gaylussacia, shrubs nearly related to the blueberries (Vaccinium), and formerly confused with them. The commonest huckelberry comes from G. Resinosa. The shrub that bears the berries. Synonym: whortleberry. Squaw huckleberry. See Deeberry. Origin: Cf. Whortleberry. Source: Websters Dictionary (01 Mar 1998) |