comprĕcātĭo, ōnis, f. [comprecor],
a common or public imploring of a deity : sollennis deorum, Liv. 39, 15, 2; plur.: deūm inmortalium, Gell. 13, 22, 1.
comprecātiō ōnis, f comprecor, a general supplication : sollemnis deorum, L. ...
An Elementary Latin Dictionary