xanthin

American  

[zan-thin] / ˈzæn θɪn /

noun

1. the part of the coloring matter in yellow flowers that is insoluble in water.

2. a yellow coloring matter in madder.

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xanthin British  

/ ˈzænθɪn /

noun

1. any of a group of yellow or orange carotene derivatives that occur in the fruit and flowers of certain plants

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Etymology

Origin of xanthin

1830–40; < French xanthine or < German Xanthin. See xantho-, -in ²

Example Sentences

In the roots three coloring matters are obtained: alizarin and purpurin, which are both red, and xanthin, which is yellow.

From Rugs: Oriental and Occidental, Antique & Modern A Handbook for Ready Reference by Holt, Rosa Belle

The spinal and muscular hyperic excitability produced by caffein is, in his opinion, due to the methyl groups attached to the xanthin nucleus.

From All About Coffee by Ukers, William H. (William Harrison)

Leucin, tyrosin, lithic acid, lithates, xanthin, cystin, keratin, sulphureted hydrogen, etc., are deposits in the urine and are signs of the derangement of the intestinal canal and liver.

From Intestinal Ills Chronic Constipation, Indigestion, Autogenetic Poisons, Diarrhea, Piles, Etc. Also Auto-Infection, Auto-Intoxication, Anemia, Emaciation, Etc. Due to Proctitis and Colitis by Jamison, Alcinous B. (Alcinous Burton)

The chief of these products are adenin, guanin, hypoxanthin, xanthin, and uric acid.

From Dietetics for Nurses by Proudfit, Fairfax T.

The xanthin group is almost without any excitatory action, and its metabolic end products are constant.

From All About Coffee by Ukers, William H. (William Harrison)