Standard Lemma guide

xenno-

prefix · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

No pronunciation record was provided for this word.

1

prefix

Meaning 1

Synonym of ronto- (used before an official prefix existed). Symbol: x

Definition source: English Wiktionary via Wiktextract

Usage: informal, morpheme

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: ronto-

Antonyms: none provided

History

Etymology

From Ancient Greek ἐννέα (ennéa, “nine”), for the ninth order of 103; with the letter x added for the third term in a series running backwards through the alphabet (after zepto- and yocto-). The final o conforms to the final vowels of the SI series from micro- downwards.