[ˈsəʊas], (Noun)

Definitions:
- each of a pair of large muscles which run from the lumbar spine through the groin on either side and, with the iliacus, flex the hip. A second muscle, the psoas minor, has a similar action but is often absent


Phrases:

Origin:
early 17th century: via Latin from Greek, accusative plural of psoa, interpreted as singular