quīncunx uncis, m quinque + uncia, five twelfths (of any whole).

—Esp., five twelfths of an as, five unciae: si de quincunce remota est Uncia, quid superat? H.

—The figure formed by the four corners of a square and its middle point, a quincunx: directi in quincuncem ordines (of trees): obliquis ordinibus in quincuncem dispositis, Cs.