obsĕcrātĭo (noun F) : obsecro.
* In gen., a beseeching, imploring, supplication, entreaty (class.): prece et obsecratione humili uti,Cic. Inv. 1, 16, 22; id. Font. 17, 39: judicum,addressed to the judges,Quint. 6, 1, 33: percipe obsecrationem meam,Vulg. Psa. 142, 1: fit ad Deum pro illis,id. Rom. 10, 1.
* In partic.
* An asseveration, protestation, accompanied by an invocation of the gods or of religious things, Gr. δέησις, Cic. de Or. 3, 53, 105; cf. Just. 24, 2, 5; cf. Macr. S. 1, 6, 13.
* A public prayer: obsecrationem indicere,Liv. 27, 11; id. 4, 21; 26, 23; 31, 9; Cic. Har. Resp. 28 fin.: habere,Suet. Caes. 22.

s. TLL