- any of three yellow or orange fat-soluble pigments having the formula C40H56, found in many plants, especially carrots, and transformed to vitamin A in the liver; provitamin A.
Origin of carotene
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- 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: C 40 H 56
Word Origin for carotene
C19 carotin, from Latin carōta carrot; see -ene
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for carotene
Online Etymology Dictionary, © 2010 Douglas Harper
- An orange-yellow to red crystalline pigment that exists in three isomeric forms designated alpha, beta, and gamma; it is converted to vitamin A in the liver and is found in animal tissue and certain plants, such as carrots and squash.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- Any of various organic compounds that occur as orange-yellow to red pigments in many plants and in animal tissue. In plant leaves, carotenes aid in the absorption of light energy by transferring the energy to chlorophyll and act as antioxidants protecting chlorophyll from damage by oxidation. In animals, carotenes are converted to vitamin A primarily in the liver. They are members of the carotenoid family of compounds and give plants such as carrots, pumpkins, and dandelions their characteristic color. Chemical formula: C40H56. See also xanthophyll.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.