The Collaborative International Dictionary of English v.0.48:
Supplicatory \Sup"pli*ca*to*ry\, a. [Cf. F. supplicatoire.] Containing supplication; humble; earnest. [1913 Webster]WordNet (r) 3.0 (2006):
supplicatory adj 1: humbly entreating; "a suppliant sinner seeking forgiveness" [syn: suppliant, supplicant, supplicatory]