-o-

the typical ending of the first element of compounds of Greek origin (as -i- is, in compounds of Latin origin), used regularly in forming new compounds with elements of Greek origin and often used in English as a connective irrespective of etymology: Franco-Italian; geography; seriocomic; speedometer.
Compare -i-.

Origin of -o-

Middle English (< Old French) < Latin < Greek

Words nearby -o-

-ness, -nik, -noia, -nomy, -o, -o-, -oate, -ock, -ode, -odont, -odontia

British Dictionary definitions for -o-

-o-

connective vowel

used to connect elements in a compound word chromosome; filmography Compare -i-

Word Origin for -o-

from Greek, stem vowel of many nouns and adjectives in combination

Medical definitions for -o-

-o-

Used as a connective to join word elements:acidophilic.