flexor hallucis brevis
noun
flexor hal·lu·cis brev·is
| \ -ˈhal-(y)ü-səs-ˈbrev-əs
, -ˈhal-ə-kəs-
\
, -ˈhal-ə-kəs-
\
Medical Definition of flexor hallucis brevis
: a short muscle of the sole of the foot that flexes the proximal phalanx of the big toe