Gamma | Webster's Dictionary of the English Language

gamma
gamma, ae, f., = γάμμα, the Greek letter Γ, gamma. I Lit., Aus. Idyll. de Lit. 12, 21.— II Tran...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
Gamma rays
·add. ·- Very penetrating rays not appreciably deflected by a magnetic or electric field, emitted by...

Webster's Dictionary of the English Language