UNCIAuncia ([schwa]n-shee-[schwa]), n. [Latin]
1. Roman law. One-twelfth of the as (a pound or, by analogy, an estate or inheritance). ? The English word ounce is derived from this term. Cf. AS; BES.
2. Hist. A measure of land used in a royal charter. ? The size of an uncia is unclear, but it may have measured 1,200 square feet (i.e., 12 modii).
3. Generally, the proportion of one-twelfth.