oct-

¹

1. variant of octa- or octo- before a vowel.

   octal.

oct.

²

abbreviation

1. octavo.

Oct.

³

abbreviation

1. October.

Oct

¹

abbreviation

1. October

oct-

²

combining form

1. (used before a vowel) a variant of octo-

Example Sentences

The Orange County Registrar of Voters contacted the district attorney’s office on Oct.

From Los Angeles Times

Applications for the notice of funding availability, or NOFA, open Friday and close Oct.

From Los Angeles Times

The Invitee program is ending Oct.

From Los Angeles Times

This year the festival initially invited the documentary “The Road Between Us: The Ultimate Rescue,” about a hostage rescue mission undertaken by a retired Israel Defense Forces officer following the Hamas attacks in Israel on Oct.

From Los Angeles Times

Although there have been complaints of antisemitism on campus since the Oct.

From Los Angeles Times

When To Use

What does oct- mean?

Oct- is a combining form used like a prefix meaning “eight.” It is used in a great many scientific and technical terms.Octo- comes from the Greek oktṓ, meaning “eight.” The Latin equivalent, which is almost identical in spelling and pronunciation, is octō.What are variants of oct-?Oct- is a variant of octa- or octo-, which loses its -a- or -o- when combined with words or word elements beginning with vowels.Want to know more? Check out our Words That Use entries for both octa- and octo-.