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octo-
Pronunciation: /ˈɒktəʊ/
(also oct- before a vowel)

Definition of octo- in English:

combiningForm

Eight; having eight: octosyllabic

Origin

From Latin octo or Greek oktō 'eight'.

Definition of octo- in:

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Pronunciation: ˈhɔːti
adjective
arrogantly superior and disdainful