Found 2 items, similar to octad.
English → English (WordNet) Definition: octad octad n : the cardinal number that is the sum of seven and one [syn: eight, 8, VIII, eighter, eighter from Decatur, ogdoad, octonary, octet]
English → English (gcide) Definition: Octad Octad \Oc"tad\, n. [Gr. ?, ?, the number eight.] 1. (Chem.) An atom or radical which has a valence of eight, or is octavalent. [1913 Webster] 2. A group of eight things. [PJC]