Standard Lemma guide

biconcave

adj · 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

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No pronunciation record was provided for this word.

1

adj

Meaning 1

Having both sides that are concave.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

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

Examples

  • a biconcave lens
  • the biconcave vertebrae
  • Red blood cells are biconcave.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adjective satellite

Meaning 2

concave on both sides

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: concavo-concave

Antonyms: none provided

History

Etymology

Etymology tree Proto-Indo-European *dwóh1 Proto-Indo-European *dwi- Proto-Italic *dwi- Latin bi-bor. English bi- English concave English biconcave From bi- + concave.

Across languages

Translations

4 source translations are retained for this English entry.

  • French: biconcave — lens
  • Greek: αμφίκοιλος (amfíkoilos) — lens
  • Italian: biconcavo — lens
  • Persian: دوکاو (dokâv) — lens