![](http://www.pchfasthealth.com/images1/shim.gif)
quadratus lum·bor·um
n : a quadrilateral-shaped muscle of the abdomen that arises from the iliac crest and the iliolumbar ligament, inserts into the lowest rib and the upper four lumbar vertebrae, and functions esp. to flex the trunk laterally .
![](http://www.fasthealth.com/dictionary/glyph/dash.gif) ![](http://www.fasthealth.com/dictionary/glyph/l.gif) ![](http://www.fasthealth.com/dictionary/glyph/schwa.gif) ![](http://www.fasthealth.com/dictionary/glyph/m.gif) ![](http://www.fasthealth.com/dictionary/glyph/dash.gif) ![](http://www.fasthealth.com/dictionary/glyph/hstres.gif) ![](http://www.fasthealth.com/dictionary/glyph/b.gif) ![](http://www.fasthealth.com/dictionary/glyph/odot.gif) ![](http://www.fasthealth.com/dictionary/glyph/r.gif) ![](http://www.fasthealth.com/dictionary/glyph/dash.gif) ![](http://www.fasthealth.com/dictionary/glyph/schwa.gif)
Published under license with Merriam-Webster, Incorporated. © 1997-2024.
|
![](http://www.pchfasthealth.com/images1/shim.gif) |
![](http://www.pchfasthealth.com/images1/shim.gif)
![](http://pictures.fasthealth.com/fh/120x45/healthstores.gif)
![](http://www.pchfasthealth.com/pimages/h_pch_ne120x90.gif)
![](http://www.fasthealth.com/pimages/fhai120x90.gif) |