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variant of :
combining form
eight: octosyllabic, octagon

word-forming element, before vowels oct-, from comb. form of Latin octo “eight” (see octa-).

octo- or oct- or octa-
Eight: octan.


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  • October

    [ok-toh-ber] /ɒkˈtoʊ bər/ noun 1. the tenth month of the year, containing 31 days. Abbreviation: Oct. 2. British. ale or beer traditionally brewed in this month. /ɒkˈtəʊbə/ noun 1. the tenth month of the year, consisting of 31 days c.1050, from Latin October (mensis), from octo “eight,” from PIE root *octo(u)- “eight” (see eight). Eighth […]

  • Octobrist

    [ok-toh-brist] /ɒkˈtoʊ brɪst/ noun 1. a member of a Russian political party that advocated constitutional monarchism: so called because it was organized after the Czar’s manifesto in October, 1905. 2. (formerly) a member of a communist organization in the Soviet Union for children ranging in age from eight to ten. /ɒkˈtəʊbrɪst/ noun 1. a member […]

  • Octocentenary

    [ok-toh-sen-ten-uh-ree, -sen-tn-er-ee or, esp. British, -sen-tee-nuh-ree] /ˌɒk toʊ sɛnˈtɛn ə ri, -ˈsɛn tnˌɛr i or, esp. British, -sɛnˈti nə ri/ adjective 1. pertaining to 800 or a period of 800 years; marking the completion of 800 years. noun, plural octocentenaries. 2. an 800th anniversary or its celebration. /ˌɒktəʊsɛnˈtiːnərɪ/ noun (pl) -naries 1. an eight-hundredth anniversary

  • Octodecillion

    [ok-toh-di-sil-yuh n] /ˌɒk toʊ dɪˈsɪl yən/ noun, plural octodecillions (as after a numeral) octodecillion. 1. a cardinal number represented in the U.S. by 1 followed by 57 zeros, and in Great Britain by 1 followed by 108 zeros. adjective 2. amounting to one octodecillion in number.

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