callōsĭtas — Lewis & Short
callōsĭtas, ātis, f.callosus,
I hardness of skin, callousness (post-class.), Scrib. Comp. 36:
fistulae,Veg. 3, 27, 3.—Trop., hardness, a hardening:
usus communis,Tert. Testim. Anim. 8:
voluntarii erroris,id. adv. Nat. 2, 1.