The Collaborative International Dictionary of English v.0.48:
Stela \Ste"la\, n.; pl. Stelae. [L., from Gr. ? a post, an upright stone.] (Gr. Antiq.) A small column or pillar, used as a monument, milestone, etc. [1913 Webster]WordNet (r) 3.0 (2006):
stela n 1: an ancient upright stone slab bearing markings [syn: stele, stela]