Meanings
-o-1
alternative -ö-
- A linking vowel inserted interconsonantally between two morphemes, to ease pronunciation, without contributing to the meaning. It frequently joins words or combining forms of Ancient Greek or Classical Latin origin in the classical compounds of New Latin and international scientific vocabulary, but it can also be used to join modern terms and even abbreviations, either formally or informally.
speed + -o- + meter → speedometer
4 more examples
extreme + -o- + -phile → extremophile
blog + -o- + -sphere → blogosphere
sadism + -o- + masochism → sadomasochism
smell + -o- + vision → smell-o-vision
-o-2
Origin
-o- · interfix
- Ancient Greek-ο-
- Latin-o-
- English-o-
Adopted from Latin -o-, originating ultimately from Ancient Greek -ο- (-o-). In English, the connective is found from the Middle English period in direct borrowings from Latin. Direct formations of English terms with the connective, always combining Greek or Latin roots, appear from the 16th or 17th century. From the 18th century, the suffix becomes productive in compounds where the second element is English. From about 1800, formations on all sorts of stems become common.
More words from Latin, Ancient Greek
Full word history & related roots →-o- · interfix
Designated in the USAN guidelines for non-proprietary names of monoclonal antibodies.
Full word history & related roots →Translations
Irish -a-
- -a-linking vowel between morphemes
Polish -o-
- -o-linking vowel between morphemes
Portuguese -o-, -ó-
- -o-linking vowel between morphemes
- -ó-linking vowel between morphemes
- -ô-linking vowel between morphemes
Cite this entry
-o-. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/-o-
“-o-.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/-o-. Accessed November 3, 2026.
WatkinsX Dictionary, s.v. “-o-,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/-o-.
Source: -o- on Wiktionary, CC BY-SA 4.0.