o·le·an·der 
(
ōl
ē-
ăn
′d
ər,
ō′l
ē-
ăn
d
ər)
n. A poisonous Eurasian evergreen shrub (Nerium oleander) with narrow leathery leaves, widely cultivated for its showy fragrant white, rose, or purple flowers. Also called rosebay.
[Medieval Latin, probably alteration (influenced by Latin olea, olive) of Late Latin lorandrum, rhododendron, alteration (probably influenced by Latin laurea, lōrea, laurel, because of its similar-shaped leaves) of Late Latin rodandrum, from Latin rhododendron; see RHODODENDRON.]