• WordNet 3.6
    • n carotin an orange isomer of an unsaturated hydrocarbon found in many plants; is converted into vitamin A in the liver
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Webster's Revised Unabridged Dictionary
    • n Carotin (Chem) A red crystallizable tasteless substance, extracted from the carrot.
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Century Dictionary and Cyclopedia
    • n carotin The coloring matter of the carrot.
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In literature:

Moreover, carotin absorbs iodine.
"The Chemistry of Plant Life" by Roscoe Wilfred Thatcher
The formation of vitamin A from carotine occurs under the influence of ATP.
"Smithsonian Institution - United States National Museum - Bulletin 240" by Anonymous