Associations to the word «Ureas»

Wiktionary

UREA, noun. (biochemistry) (uncountable) A water-soluble organic compound, CO(NH2)2, formed by the metabolism of proteins and excreted in the urine.
UREA, noun. (chemistry) (countable) Any N-substituted derivative of urea, with the general formula (R1R2N)CO(NR3R4).

Dictionary definition

UREA, noun. The chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics.

Wise words

A word is not a crystal, transparent and unchanged; it is the skin of a living thought and may vary greatly in color and content according to the circumstances and time in which it is used.
Oliver Wendell Holmes, Jr.