plane (subs.) Copy link Outline I. A level superficiesII. The toolIII. The tree • plane (subs.): I. A level superficies: expr. by plānus: the neut. of which may be used as subs.: cf. Front. Goes. p. 31: v. plane, adj. II. The tool: runcīna: Plin. 16, 42, 82. III. The tree: plătănus, i, f.: Cic. de Or. 1, 7, 28. Hor. A grove of p.s, plătănōn, ōnis: Petr. Mart. Made of p. wood, platanĭnus: Col.