carotene(redirected from Alpha-ring)
Also found in: Thesaurus, Medical, Encyclopedia.
car·o·tene(kăr′ə-tēn′) also car·o·tin (-tĭn)
An orange-yellow to red crystalline pigment, C40H56, found in animal tissue and certain plants, such as carrots and squash. It exists in several isomeric forms and is converted to vitamin A in the liver.
[German Karotin, from Latin carōta, carrot; see carrot.]
(Biochemistry) any of four orange-red isomers of an unsaturated hydrocarbon present in many plants (β-carotene is the orange pigment of carrots) and converted to vitamin A in the liver. Formula: C40H56
[C19 carotin, from Latin carōta carrot; see -ene]
any of three yellow or orange fat-soluble pigments having the formula C40H56, found in many plants, esp. carrots, and transformed into vitamin A in the liver; provitamin A.
An organic compound that occurs as an orange-yellow to red pigment in many plants and in animal tissue. In animals, it is converted to vitamin A by the liver. Carotenes give plants such as carrots, pumpkins, and dandelions their characteristic color.
Switch to new thesaurus
|Noun||1.||carotene - an orange isomer of an unsaturated hydrocarbon found in many plants; is converted into vitamin A in the liver|
beta-carotene - an isomer of carotene that is found in dark green and dark yellow fruits and vegetables
provitamin - vitamin precursor; a substance that is converted into a vitamin in animal tissues
|2.||carotene - yellow or orange-red fat-soluble pigments in plants|
carotenoid - any of a class of highly unsaturated yellow to red pigments occurring in plants and animals