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heptad

n. 七个,七个成套之物,七价原子

七个,七个成套之物,七价原子

WordNet (r) 3.0 (2006) (WordNet)

heptad
n 1: the cardinal number that is the sum of six and one [synonym:
{seven}, {7}, {VII}, {sevener}, {heptad}, {septet},
{septenary}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Heptad \Hep"tad\, n. [L. heptas the number seven. Gr. ?, ?, fr.
"epta` seven.] (Chem.)
An atom which has a valence of seven, and which can be
theoretically combined with, substituted for, or replaced by,
seven monad atoms or radicals; as, iodine is a heptad in
iodic acid. Also used as an adjective.
[1913 Webster]

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单词	字典	翻译
Heptad	查看　Heptad　在百度字典中的解释	百度英翻中〔查看〕
Heptad	查看　Heptad　在Google字典中的解释	Google英翻中〔查看〕
Heptad	查看　Heptad　在Yahoo字典中的解释	Yahoo英翻中〔查看〕

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