单词 | octad |
释义 | octad —octadic, adj. /ok"tad/, n. 1. a group or series of eight. 2. Chem. an element, atom, or group having a valence of eight. [1835-45; < Gk oktad- (s. of oktás) group of eight, equiv. to okt- OCT- + -ad -AD1] |
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