The Collaborative International Dictionary
monopteral
monopteral \mo*nop"ter*al\ (m[-o]*n[o^]p"t[~e]r*al), a. [Gr. mono`pteros with a row of pillars only; mo`nos alone, only + ptero`n feather, wing, also, a row of pillars: cf. F. monopt[`e]re.] (Arch.) Round and without a cella; consisting of a single ring of columns supporting a roof; -- said esp. of a temple.
Wiktionary
monopteral
a. (context architecture English) round and without a cella; consisting of a single ring of columns supporting a roof; said especially of a temple.
WordNet
monopteral
adj. having circular columniation