cog·nate /ˈkɑgˌnet/
 (a.)同族的;母族的;同源的


 Cog·nate a.
 1. Allied by blood; kindred by birth; specifically Law, related on the mother's side.
 2. Of the same or a similar nature; of the same family; proceeding from the same stock or root; allied; kindred; as, a cognate language.


 Cog·nate, n.
 1. Law One who is related to another on the female side.
 2. One of a number of things allied in origin or nature; as, certain letters are cognates.

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 cognate
      adj 1: related in nature; "connate qualities" [syn: connate]
      2: having the same ancestral language; "cognate languages"
      3: related by blood [syn: akin(p), blood-related, consanguine,
          consanguineous, kin(p)]
      n 1: one related by blood or origin; especially on sharing an
           ancestor with another [syn: blood relation, {blood
           relative, sib]
      2: a word is cognate with another if both derive from the same
         word in an ancestral language [syn: cognate word]