[pley-ner] 
| a small tree, Planera aquatica, of the elm family, growing in moist ground in the southern U.S., bearing a small, ovoid, nutlike fruit and yielding a compact light-brown wood. |
| pla·ner tree (plā'nər) n. A small, deciduous, elmlike swamp tree (Planera aquatica) of the southern United States, having small, ribbed, nutlike fruit. Also called water elm. [After Johann Jacob Planer (1743-1789), German botanist.] |