trīcēnārĭus — Lewis & Short
trīcēnārĭus, a, um, adj.triceni,
I of or containing thirty:
fistula,thirty quarterdigits in diameter, Front. Aquaed. 29; 48:
filius,thirty years old, Sen. Excerpt. Controv. 3, 3 fin.:
homo,Arn. 2, 58; Pall. Aug. 12; Front. Aquaed. 29; 48.