carotene

中文： 胡萝卜素

1. A class of tetraterpene plant pigments; they vary in colour from yellow, through orange to red, this colour originating in a chain of alternating single and double bonds. (countable, uncountable)
2. Specifically, a number of isomers of tetraterpene hydrocarbons, C₄₀H₅₆, (especially beta-carotene), present in carrots etc, which are converted into vitamin A in the liver. (countable, uncountable)

复数 carotenes