HETEROCYCLIC Scrabble 24 Words With Friends 26 Definition adjective containing a closed ring of atoms of which at least one is not a carbon atom. noun a compound containing a heterocyclic ring. — synonyms: heterocyclic_compound, heterocycle See all 407 words you can make from HETEROCYCLIC → 12-letter words Words starting with H Words ending with C ← Unscramble different letters