hy·droxy·pro·line -'prō-.lēn n an amino acid C5H9NO3 that occurs naturally as a constituent of collagen
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n.
a compound, similar in structure to the amino acid, found only in collagen.
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hy·droxy·pro·line (hi-drok″se-proґlēn) a hydroxylated form of the imino acid proline; it occurs in connective tissue proteins, particularly collagen. The majority is 4-hydroxyproline, but some of the 3-hydroxy form is also present.Medical dictionary. 2011.