Source : Webster's Revised Unabridged Dictionary (1913)

Cuckold \Cuck"old\ (k?k"?ld), n. [OE. kukeweld, cokewold,
   cokold, fr. OF. coucoul, cucuault, the last syllable being
   modified by the OE. suffix -wold (see {Herald}); cf. F. cocu
   a cuckold, formerly also, a cuckoo, and L. cuculus a cuckoo.
   The word alludes to the habit of the female cuckoo, who lays
   her eggs in the nests of other birds, to be hatched by them.]
   1. A man whose wife is unfaithful; the husband of an
      adulteress. --Shak.

   2. (Zo["o]l.)
      (a) A West Indian plectognath fish ({Ostracion
          triqueter}).
      (b) The cowfish.