What is another word for "discoid"?

Roget's Thesaurus (1911) lists these synonyms for "discoid": about, air, around, belle, board, circumjacence, covering, disc, disk, eccentric, eccentricity, etoile, even, excentric, excentricity, exterior, exteriority, exteriorly, external, externally, extra, extrados, extralimitary, extramundane, extramural, extrinsic, face, facet, filmy, flaky, flat, flatness, flatten, flounder, fluke, flush, foliaceous, foliated, fresco, frontal.