noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A five-membered heterocycle having three carbon atoms, one oxygen atom, one boron atom and two double bonds; it, and its derivatives, are formally derived from an oxazole by replacing the nitrogen atom with one of boron

Etymology

From oxa- + borole.

Related phrases

double bond

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.