Definition of tiercel in English:

tiercel

noun

(also tercel)
Falconry
  • The male of a hawk, especially a peregrine or a goshawk.

    Compare with falcon

Pronunciation

tiercel

/ˈtirsəl/ /ˈtɪrsəl/

Origin

Middle English from Old French, based on Latin tertius ‘third’, perhaps from the belief that the third egg of a clutch produced a male.