milt
noun
°The organ spleen, especially of a domestic animal.
"1983: Adam Kadmon had pneumonia. Friar Goat cured it by tying a bullock’s milt to the soles of the lad’s feet, and burying the milt afterwards. Adam Kadmon immediately contracted the thrush. — Robert Nye, The Facts of Life"
°Fish semen.
synonyms: soft roe, white roe