- a bronze coin of ancient Rome, the 12th part of an as.
- (in prescriptions) an ounce of weight or volume.
Origin of uncia
1685–95; < Latin: a twelfth part, akin to ūnus one; cf. inch1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for uncia
The uncia into four sicilici, the sicilicus into thirty-six siliquae.
This is the Felis uncia, allied to the panther and the cheetah.Milton's Comus
Another cement is made of a bes of brick dust, a third of rock salt, an uncia of saltpetre, and half an uncia of refined salt.
Of each bes of silver one sicilicus is consumed, or occasionally when very impure, three drachmae or half an uncia.
And likewise they add two centumpondia of poor silver-lead, in each of which there is an uncia and a drachma of silver.