insula

in·su·la

noun \ˈin(t)s-(y)ə-lə, ˈin-shə-lə\

plural in·su·lae \-ˌlē, -ˌlī\

Definition of INSULA

: the lobe in the center of the cerebral hemisphere that is situated deeply between the lips of the sylvian fissure—called also central lobe, island of Reil