Cognate (, "related by birth") may mean:
Cognates, words that have a common etymological origin False cognates, words that appear to be cognates, but are not Cognate object, a verb's object that is etymologically related to the verb Cognate (kinship), person who shares a common ancestor Cognate linkage, a kinematic linkage that generates the same coupler curve as another linkage of a different geometry Cognate interaction, in immunology denotes the specific, contact-dependent interaction between two cells.
See also Connation, in plants, the fusion of organs of the same type
de:Kognat