Any of several roughly square or rectangular muscles, e.g. in the abdomen, thigh, and eye socket.‘The fourth layer is composed of a single muscle, pronator quadratus, which is not seen at this level.’
- ‘In this section pronator quadratus is thinning and is seen for the last time.’
- ‘The quadratus femoris and obturator externus muscles appear for the first time in this section.’
- ‘The extension of muscle fibers onto the fascia of psoas or quadratus lumborum occurs occasionally.’
- ‘Adductor minimus may be innervated by the nerve to quadratus femoris.’
Mid 18th century from Latin, literally ‘made square’.
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