Standard Lemma guide

monogon

noun · 3 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.

  • UK: Recorded audio is listed in the source snapshot.

1

noun

Meaning 1

A one-dimensional object comprising one vertex and one (not necessarily straight) edge both of whose ends are that vertex.

Definition source: English Wiktionary via Wiktextract

Topics: geometry, mathematics, sciences

Examples

  • 2003, Gordon Baker, translator and editor, Ludwig Wittgenstein and Friedrich Waismann, The Voices of Wittgenstein: The Vienna Circle, Routledge, →ISBN, page 409, We explain to somebody what is a regular quadrilateral constructed within the circle; then a regular triangle and a regular bi-angle. Now we ask him to draw a regular monogon by analogy, and we probably think that he cannot do this. But what if he draws a point on the circle and says that it is a regular monogon?

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A two-dimensional object comprising one vertex, one edge both of whose ends are that vertex, and one face filling in the hollow formed by that edge.

Definition source: English Wiktionary via Wiktextract

Topics: geometry, mathematics, sciences

Examples

  • 2002, Tao Li, "Laminar Branched Surfaces in 3–manifolds", Geometry & Topology 6, page 158, There is no monogon in M-int(N(B)), ie, no disk D⊂M-int(N(B)) with ∂D=D∩N(B)=α∪β, where α⊂∂_(vN)(B) is in an interval fiber of ∂_(vN)(B) and β⊂∂_(hN)(B).

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A single-faceted reflector.

Definition source: English Wiktionary via Wiktextract

Topics: engineering, natural-sciences, optics, physical-sciences, physics

Examples

  • 1999, William L. Wolfe, Infrared Design Examples, Tutorial Texts in Optical Engineering Volume TT36, SPIE Press, →ISBN, page 133, These devices also start with the monogon, a plane mirror, and include the bigon, a two-sided mirror, the trigon, quadrigon, and general n-gons.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From mono- + -gon.

Across languages

Translations

8 source translations are retained for this English entry.

  • Czech: jednoúhelník — geometry
  • Dutch: eenhoek — geometry
  • East Frisian Low German: äinkâant — geometry
  • Finnish: yksikulmio — geometry
  • German: Eineck — geometry
  • Kazakh: бірбұрыш (bırbūryş) — geometry
  • Polish: kształt o jednym wierzchołku — geometry
  • Russian: одноуго́льник (odnougólʹnik) — geometry