T / tympănĭum
noun greek

tympănĭum

gen. tympănii · gender neuter · decl. 2nd
= τυμπάνιον
a precious stone shaped like a tambourine
a precious stone shaped like a tambourine, Plin. 9, 35, 54, § 109; Dig. 34, 2, 32, § 9.