PSOAS • FREE-TRANSLATOR.COM • Definition of Psoas

... of intermittent lameness which affected the left hip, and repeated examinations did not disclose the cause of the trouble. After about a year there was established spontaneously an opening through the integument overlying the region of the attachment of the psoas major (magnus), through which pus discharged. With the occurrence of this fistula, lameness almost entirely disappeared, but the emission of a small amount of pus persisted for more than a year. The subject was not observed thereafter and the outcome in this case is not a matter of record. ...

— Lameness of the Horse - Veterinary Practitioners' Series, No. 1 • John Victor Lacroix