/terr"seuhl/ , n. Falconry.
the male of a hawk, esp. of a gyrfalcon or peregrine.
Also, tercelet /terrs"lit/ , tiercel .
[ 1350-1400; ME terçuel tertiolus, equiv. to L terti ( us ) third + -olus -OLE 1 ; prob. so called because the male is about one third smaller than the female ]