E / ērĭcĭus
noun

ērĭcĭus

gen. ērĭcii · gender masculine · decl. 2nd
a hedgehog; urchin
a hedgehog, urchin.
the bittern
Prop., Varr. ap. Non. 49, 10, and 106, 18; cf. Isid. Orig. 12, 3, 7; Vulg. Isa. 14, 23; 34, 11 (as translation of Heb. kipōd, which was probably a bird—perh. the bittern. But the LXX. and Gesenius, Thes. Heb. s. v., sustain the Vulgate).—
a beam armed with sharp spikes to keep off assailants by extension
Transf., in milit. lang., a beam armed with sharp spikes to keep off assailants, Caes. B. C. 3, 67, 5 and 6; Sall. Fragm. ap. Non. 555, 2.