CURCUMIN
Etymology
Noun
curcumin (countable and uncountable, plural curcumins)
(chemistry) A polyphenol ''(1E,6E)-1,7-bis(4-hydroxy-3-methoxyphenyl)hepta-1,6-diene-3,5-dione; a major constituent of the spice turmeric.
Synonyms
• circumin
• E100
Hypernyms
• curcuminoid
Source: Wiktionary
Cur"cu*min (-mn), n. (Chem.)
Definition: The coloring principle of turmeric, or curcuma root, extracted
as an orange yellow crystalline substance, C14H14O4, with a green
fluorescence.
Note: It possesses acid properties and with alkalies forms brownish
salts. This change in color from yellow to brown is the
characteristic reaction of tumeric paper. See Turmeric paper, under
Turmeric.
Source: Webster’s Unabridged Dictionary 1913 Edition