vitamin K1

noun

1. a yellowish, oily, viscous liquid, C 31 H 46 O 2 , occurring in leafy vegetables, rice, bran, hog liver, etc., or obtained especially from alfalfa or putrefied sardine meat, or synthesized, that promotes blood clotting by increasing the prothrombin content of the blood.

vitamin K1

noun

1. another name for phylloquinone

vitamin K1

1. The major dietary form of vitamin K that is synthesized in plants and found primarily in green, leafy vegetables such as alfalfa and in vegetable oils. It can be made synthetically and is given orally to treat prothrombin deficiency that results from heparin and other anticoagulant drugs. Also called phylloquinone. Chemical formula: C ₃₁ H ₄₆ O ₂ .

Word History and Origins

Origin of vitamin K1¹

First recorded in 1930–35