insula
noun
in·su·la
| \ ˈin(t)s-(y)ə-lə
, ˈin-shə-lə
\
, ˈin-shə-lə
\
plural insulae\ -ˌlē
, -ˌlī
\
, -ˌlī
\
Medical 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