| planer | 1. One who, or that which, planes; a planing machine; especially, a machine for planing wood or metals. 2. A wooden block used for forcing down the type in a form, and making the surface even. Planer centers. See Center. Source: Websters Dictionary (01 Mar 1998) |
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| planer tree | <botany> A small-leaved North American tree (Planera aquatica) related to the elm, but having a wingless, nutlike fruit. Origin: From J.S.Planer, a German botanist. Source: Websters Dictionary (01 Mar 1998) |