Definition of octo- in English:

octo-

Syllabification: octo-
(also oct- before a vowel)

combining form

  • Eight; having eight: octosyllabic

Origin

from Latin octo or Greek oktō 'eight'.

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Word of the day grotesquerie
Pronunciation: grəʊˈtɛskəri
noun
grotesque quality or grotesque things collectively