τρίκογχος
τρίκογχος, with three
Could not find Τρίκοστον in Logeion dictionaries.
Τρίκοστον Proper-name noun: masculine accusative singular of Τρίκοστος
τρί-κογχος, ον, Archit.,
- with three κόγχαι or apses (v. κόγχη IV), τὸ τ. σῖγμα Princeton Exp.Inscr. 111 A No.561 (Syria, V A.D.).