Lewis Short
chēlē | chēlae, ārum (noun F.f) = χηλή: (the claws or arms of animals). *
* In mechanics, the claw-shaped part of the ballista, the trigger: manicula,Vitr. 10, 15 and 17.
* Plur.: , , ; in astron., lit. the arms of Scorpio; but, since these extend into Libra, meton. Libra, Verg. G. 1, 33; Cic. Arat. 293; Col. 10, 56; Luc. 1, 659; Manil. 4, 203; cf. Claud. Cons. Mall. Theod. 120.
Charlton T. Lewis, Charles Short, A Latin Dictionary