Medical Dictionary

supernumerary

adj su·per·nu·mer·ary
\ˌsü-pər-ˈn(y)ü-mə-ˌrer-ē, -ˈn(y)üm-(ə-)rē\

Medical Definition of SUPERNUMERARY

:  exceeding the usual or normal number <supernumerary teeth> <a supernumerary rib>

Browse

How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears