psoas major (muscle)
groin muscle; origin, bodies of vertebrae and intervertebral discs from the twelfth thoracic to the fifth lumbar, and transverse processes of the lumbar vertebrae; insertion, forms a common insertion with iliacus muscle into lesser trochanter of femur; action, primary flexor of hip joint; nerve supply, lumbar plexus (ventral rami of first, second and usually third lumbar spinal nerves).
Synonym(s): musculus psoas majorTA, greater psoas muscle
Search Stedman's Medical Dictionary
Examples: glitazone, GI cocktail, etc.