ὀλίσθ-ημα · olisth-ēma — LSJ
slip, fall, ὑγρὰ -ήματα ὑδάτων Pl. Ti. 43c ; ὀ. γῆς place where a landslip has occurred, J. AJ 15.10.3 ; so ὀ. without γῆς, Inscr.Prien. 42.10,42 (ii B. C.) ; in moral sense, cause of slipping, Plu. Adul. 2.49c.
luxation, Hp. Fract. 14, Heliod. ap. Orib. 49.9.16, Gal. 19.460, etc.