τριγωνικός
From LSJ
Οὔτ' ἐν φθιμένοις οὔτ' ἐν ζωοῖσιν ἀριθμουμένη, χωρὶς δή τινα τῶνδ' ἔχουσα μοῖραν → Neither among the dead nor the living do I count myself, having a lot apart from these
English (LSJ)
ή, όν,
A triangular, Ptol.Tetr.38, Iamb. in Nic.p.58P.; πυραμίδες, on triangular base, Nicom.Ar.2.14. Adv. -κῶς An.Ox. 3.195.