τρίαινα

Etymology
From. Chantraine considers a folk-etymological transformation after the numeral. Furnée compares and, and asks whether the word could be a transformation of a  loan for an agricultural tool.

Noun

 * 1) trident, the badge of Poseidon
 * 2) three-pronged fork
 * 3)  kind of cautery
 * 1)  kind of cautery
 * 1)  kind of cautery

Noun

 * 1) trident three tined harpoon