noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Either of two isomers of polycyclic aromatic ketones derived from naphthalene. countable, uncountable
2. 2
   a fat-soluble vitamin that helps in the clotting of blood wordnet

Synonyms

All synonyms

antihemorrhagic factorascorbic acidniacinriboflavinvitaminvitamin k