milt (mɪlt) n. 1. the sperm-containing secretion of the testes of fishes. 2. the testes and sperm ducts when filled with this secretion. milt (mĭlt) Fish sperm, together with the milky liquid that contains them.

Breeding. To fertilize (fish roe) with milt. Fish sperm, together with the milky liquid that contains them. The spleen, especially of an animal bred for food. Fish semen. To impregnate (the roe of a fish) with milt. From Old English milte, milt (“milt, spleen"), from Proto-Indo-European * (s)meld- (“to beat, grind, crush, weaken").

milt - seminal fluid produced by male fish. fish - any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills; "the shark is a large fish"; "in the living room there was a tank of colorful fish".

For the orchid genus abbreviated Milt., see Miltonia. Milt is the seminal fluid of fish, mollusks, and certain other water-dwelling animals which reproduce by spraying this fluid, which contains the cum, onto roe (fish eggs). It can also refer to the sperm sacs or testes that contain the cum.