Standard Lemma guide

nonorientable

adj · 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.

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Pronunciation

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1

adj

Meaning 1

Not able to be oriented.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: mathematics, sciences, topology

Examples

  • The Möbius strip is a nonorientable surface.
  • Through every point of a nonorientable surface there passes a Möbius-like nonorientable strip (with an odd number of half-twists) which is part of that surface.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Etymology tree English non- English orient Proto-Indo-European *-tḗr Proto-Indo-European *-dhlom Proto-Indo-European *-dhlis Proto-Italic *-ðlis Latin -bilis Latin -ābilis Old French -ablebor. Middle English -able English -able English orientable English nonorientable From non- + orientable.