Standard Lemma guide

trisector

noun · 2 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.

  • US: tɹī′sĕk′tər
  • US: /ˈtɹaɪˌsɛktɚ/
  • US: Recorded audio is listed in the source snapshot.
  • rhymes with -ɛktə(ɹ)

1

noun

Meaning 1

A line or curve that trisects something.

Definition source: English Wiktionary via Wiktextract

Topics: geometry, mathematics, sciences

Examples

  • Coordinate term: bisector

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Someone who believes to have found a way to construct an angle one-third the size of an arbitrary angle using only an unmarked straightedge and compass (this is known to be impossible; see Angle trisection § Proof of impossibility on WikipediaWikipedia ).

Definition source: English Wiktionary via Wiktextract

Usage: informal

Topics: geometry, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From trisect + -or.