cernuus

Etymology
From.

Adjective

 * 1) with the face turned towards the earth, inclined forwards, stooping or bowing forwards
 * Tantum ergo Sacramentum / Veneremur cernui (Tantum Ergo, Thomas Aquinas)
 * Therefore, so great a Sacrament / Let us venerate bowed forwards
 * 1)  falling over
 * Equus cernuus (Aeneid liber X 894)
 * falling horse