[kahy-nin, kin-in]
noun Biochemistry.
any of a group of hormones, formed in body tissues, that cause dilation of blood vessels and influence capillary permeability.

1950–55; independent use of -kinin, or (cyto)kin(esis) + -in2 Unabridged


a combining form used in the names of hormones, especially peptide hormones: bradykinin; cytokinin.

< Greek kīn(eîn) to move, set in motion (cf. kinesis, kinetic) + -in2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
kinin (ˈkaɪnɪn)
1.  any of a group of polypeptides in the blood that cause dilation of the blood vessels and make smooth muscles contract
2.  another name for cytokinin
[C20: from Greek kin(ēma) motion + -in]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

kinin ki·nin (kī'nĭn)
Any of various polypeptides, such as bradykinin, that act locally to induce vasodilation and contraction of smooth muscle.

The American Heritage® Stedman's Medical Dictionary
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