Meaning

noun a compound containing a heterocyclic ring

adjective containing a closed ring of atoms of which at least one is not a carbon atom

originEtymology tree Proto-Indo-European *sem- Proto-Indo-European *sḿ̥teros Proto-Hellenic *hə́teros Ancient Greek ἕτερος (héteros)lbor. English hetero- Proto-Indo-European *kʷel- Proto-Indo-European *kʷékʷlos Ancient Greek κύκλος (kúklos) Proto-Indo-European *-kos Ancient Greek -κός (-kós) Ancient Greek -ικός (-ikós) Ancient Greek κυκλῐκός (kuklĭkós)bor. Classical Latin cyclicuslbor. Middle French…

Etymology from Wiktionary, CC BY-SA 3.0