E / excē^tra
noun

excē^tra

gen. excē^trae · gender feminine · decl. 1st
perh. corrupted from ἔχιδνα
a snake; serpent
a snake, serpent (very rare).
poetic
Prop., Plaut. Pers. 1, 1, 3 sq.; * Cic. poet. Tusc. 2, 9, 22.—
by extension
Transf., a reproachful epithet for a bad, intriguing woman, Plaut. Cas. 3, 5, 19; id. Ps. 1, 2, 82; Liv. 39, 11.