Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
biconcave is an adjective meaning "concave on both sides". It carries one recorded sense.
concave on both sides
Definitions, synonyms and semantic relations for biconcave come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.