cuckolder

plural cuckolders

1. biologyA male of certain kinds of fish that interrupts a mating pair to release sperm in an attempt to fertilize the female.
2. One who commits cuckoldry; one who cuckolds.

   Gascoigne, Hundreth Sundrie Flowres (1573) 78 has a teasing passage in which cuckold and cuckolder are out hunting.

   2001, Gordon Williams, A Dictionary of Sexual Language and Imagery in Shakespearean and Stuart Literature, A&C Black, →ISBN, page 277

   1 more example

   The friends of the respective parties, those of the cuckolder on one side, and those of the cuckoldee on the other side; and the public (as far as play-house audiences are the public) have fairly decided in favour of the cuckolder! What an admirable system of “public instruction”!

   1825 February 5, William Cobbett, “To Mr. Brougham—On Newspaper Government; and on his Education Project”, in Cobbett's Weekly Register, volume 53, number 6, page 333