|vislət|sānəsə̇z- noun
Usage: usually capitalized W
Etymology: after Frederick A. Wislizenus died 1889 American physician and explorer born in Germany
: a poplar ( Populus wislizenii ) of the southwestern United States that is often planted as a shade tree in arid regions and has large yellowish green leaves — called also Wiz·le·zen's poplar ˈvisləˌzānz-