noun technical a group or set of six.
C17: from Gk hexas, hexad-, from hex 'six'.

English new terms dictionary. 2014.

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  • Hexad — Hex ad, n. [L. hexas, hexadis, the number six, Gr. ?, ?, fr. e x six.] (chem.) An atom whose valence is six, and which can be theoretically combined with, substituted for, or replaced by, six monad atoms or radicals; as, sulphur is a hexad in… …   The Collaborative International Dictionary of English

  • hexad — [hek′sad΄] n. [LL hexas (gen. hexadis) < Gr hexas (gen. hexados), the number six < hex, SIX] a series or group of six hexadic adj …   English World dictionary

  • hexad — hexadic, adj. /hek sad/, n. 1. the number six. 2. a group or series of six. [1650 60; < LL hexad (s. of hexas) < Gk hexad (s. of hexás) unit of six, equiv. to héx SIX + ad AD1] * * * …   Universalium

  • hexad — hex•ad [[t]ˈhɛk sæd[/t]] n. math. a group or series of six • Etymology: 1650–60; < LL hexad , s. of hexas < Gk hexás=héx six+ as ad I hex•ad′ic, adj …   From formal English to slang

  • hexad — noun A group of six …   Wiktionary

  • hexad — A sexivalent element or radical. * * * hex·ad (hekґsad) 1. a group or combination of six similar or related entities. 2. any element having a valence of six …   Medical dictionary

  • hexad — n. number six; group of six …   English contemporary dictionary

  • hexad — hex·ad …   English syllables

  • hexad — /ˈhɛksæd/ (say heksad) noun 1. the number six. 2. a group or series of six. {Late Latin hexas, from Greek: the number six} –hexadic /hɛkˈsædɪk/ (say hek sadik), adjective …  

  • hexad —   n. group of six.    ♦ hexadic, a …   Dictionary of difficult words

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