or ECCULEUS, in antiquity, a kind of rack used for extorting a confession, at first chiefly practised on slaves, but afterwards made use of against the Christians.

The equuleus was made of wood, having holes at certain distances, with a screw, by which the criminal was stretched to the third, sometimes to the fourth, or fifth holes, his arms and legs being fastened on the equuleus with cords; and thus was hoisted aloft, and extended in such a manner, that all his bones were dislocated. In this state red-hot plates were applied to his body, and he was goaded in the sides with an instrument called ungula.

EQUICULUS, and EQUUS Minor, the horse's head, in astronomy, a constellation of the northern hemisphere, whose stars in Ptolemy's catalogue are 4, in Tycho's 4, in Hevelius's 6, and in Mr Flamsteed's 10.