extensor pollicis brevis
noun
extensor pol·li·cis brev·is
-ˈpäl-ə-səs-ˈbrev-əs 
-ˈpäl-ə-kəs-
-ˈpäl-ə-kəs-
: a muscle that arises from the dorsal surface of the radius, extends the first phalanx of the thumb, and adducts the hand
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“Extensor pollicis brevis.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/extensor%20pollicis%20brevis. Accessed 22 Dec. 2024.
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