O / ōrārĭum
noun

ōrārĭum

gen. ōrārii · gender neuter · decl. 2nd
a napkin; handkerchief
a napkin, handkerchief, Lucil. ap. Non. 539, 22: oculum ligavit orario, Aug. Civ. Dei, 22, 8, 7.—Used in signifying applause, Vop. Aur. 48 fin.