thre·o·nine 
(thrēə-nēn′, -nĭn)
(thrēə-nēn′, -nĭn)n.
A colorless crystalline amino acid, C4H9NO3, that is obtained from the hydrolysis of protein and is an essential component of human nutrition.
[Probably from threose, a kind of sugar (alteration of erythrose : ERYTHRO- + -OSE2) + -INE2.]
- impregnate
- impregnation
- impregnator
- impresa
- impresario
- impress
- impress
- impressibility
- impressible
- impressibly
- impression
- impressionability
- impressionable
- impressionism
- impressionist
- impressionistic
- impressionistically
- impressive
- impressively
- impressiveness
- impressment
- impressure
- imprest
- imprimatur
- imprimis