noun

• (archaeology) An upright (or formerly upright) slab containing engraved or painted decorations or inscriptions; a stela.
• (archaeology, uncommon) Any carved or engraved surface.
• (architecture, archaeology, obsolete) An acroterion, the decoration on the ridge of an ancient Greek building such as a temple.
• (botany) The central core of a plant's root and stem system, especially including the vascular tissue and developed from the plerome.