rhododendron (n.) Look up rhododendron at Dictionary.com
c. 1600, from French rhododendron and directly from Latin rhododendron, from Greek rhododendron, literally "rose-tree," from rhodon "rose" (see rose (n.1)) + dendron "tree," from PIE *der-drew-, from root *deru- "to be firm, solid, steadfast," also forming words for "wood, tree."