hypothenar eminence

noun
hy·​po·​the·​nar eminence | \ ˌhī-pō-ˈthē-ˌnär- How to pronounce hypothenar eminence (audio) , -nər-; hī-ˈpäth-ə-ˌnär- How to pronounce hypothenar eminence (audio) , -nər-\

Medical Definition of hypothenar eminence

: the prominent part of the palm of the hand above the base of the little finger