5 letter word starting with oct

Words Parts of Speech Meaning/Definition/Similar Words
octa- A prefix meaning eight. See Octo-., A combining form meaning eight; as in octodecimal, octodecimal, octolocular.
octad noun An atom or radical which has a valence of eight, or is octavalent.
octet noun A composition for eight parts, usually for eight solo instruments or voices.
octic adjective Of the eighth degree or order., A quantic of the eighth degree.
octo- Alt. of Octa-
octyl noun A hypothetical hydrocarbon radical regarded as an essential residue of octane, and as entering into its derivatives; as, octyl alcohol.