The Collaborative International Dictionary of English v.0.48:
Penology \Pe*nol"o*gy\, n. [Gr. poinh`, or L. poena, punishment + -logy.] The science or art of punishment. [Written also p[oe]nology.] [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Poenology \P[oe]*nol"o*gy\ (p[-e]*n[o^]l"[-o]*j[y^]), n. See Penology. [1913 Webster]