either of two muscles attached to the lower spinal column, esp. the one that controls certain movements of the thigh
Origin of psoasModern Latin from accusative plural of Classical Greek psoa, muscle of the loins
- The larger of two muscles that originate in the lower spine. This muscle flexes the hip. Also called psoas major .
- The smaller of two muscles that originate in the lower spine. This muscle flexes the lower spine. Also called psoas minor .
Origin of psoasNew Latin from Greek psoa
(plural psoae or psoai or psoas)