P / planca
noun

planca

gen. plancae · gender feminine · decl. 1st
root πλακ-; v. 2. plaga, = πλάξ
a board; slab; plank
a board, slab, plank (post-Aug.): plancae tabulae planae, Paul. ex Fest. p. 231 Müll.: roboreae, Pall. 1, 21, 2.—
A slab of marble; slab
A slab of marble, slab upon graves, Inscr. Don. 278, 3; Inscr. Murat. 1427, 4.