prostoon

[ proh-stoh-on ]
/ proʊˈstoʊ ɒn /

noun, plural pro·sto·a [proh-stoh-uh] /proʊˈstoʊ ə/.

(in classical architecture) a portico.

Origin of prostoon

< Greek próstoon; see pro-2, stoa
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019