I.the urchin, hedgehog, Ar., etc.
2.the sea-urchin, Plat.
II.the shell of the sea-urchin, often used as a cup: then like Lat. testa, a pot, jug, pitcher, Lat. echinus, Ar., etc.:— the vase in which the notes of evidence were deposited, Dem.
III.in pl. sharp points at each end of a bit, Xen.