The Collaborative International Dictionary
vitamin K3
vitamin K3 \vitamin K3\ n.
menadione, ( C11H8O2) being chemically
2-methyl-1,4,-naphthoquinone. Having no side chain in the 3
position, it cannot exert all functions of a true K vitamin
and the designation as vitamin K3 has been discouraged
--[MI11]
Syn: vitaminK2(0); menaphthone.
WordNet
vitamin K3
n. a form of vitamin K [syn: menadione]