/oh"lee an'deuhr, oh'lee an"-/ , n.
a poisonous shrub, Nerium oleander, of the dogbane family, native to southern Eurasia, having evergreen leaves and showy clusters of pink, red, or white flowers, and widely cultivated as an ornamental.
[ 1540-50; oleander, oliandrum, obscurely akin to LL laurandrum, perh. a conflation of L laurus LAUREL and rhododendron RHODODENDRON ]