τριγωνίζω

A. multiply by three, Plu. 2.416b (Pass.).

2. represent as a triangular number, Nicom. Ar. 2.8 (Pass.).

II. intr., to be triangular, νῆσος τριγωνίζουσα Hld. 10.5:—Pass., τετριγωνίσθαι assume triangular form, Plot. 2.6.2; ὁ ὀδοὺς ‐ίζεται Hippiatr. 95.

III. Astrol., to be in trine aspect, Ptol. Tetr. 115, Man. 4.266: c. acc., Ἑρμῆς Δία ‐ίζων Vett.Val. 73.26; Ζῆνα ‐ίζων Φαίνων Orph. Fr. 286.