Dictionary (a.) Having but one gill, as certain molluscs.Thesaurus monadal monadic one-sided uniangulate unibivalent unibranchiate unicameral unicellular unicuspid unidentate unidigitate unidimensional unidirectional uniflorous unifoliate unifoliolate unigenital uniglobular unilateral unilinear uniliteral unilobed unilobular unimodular unimolecular uniocular unipart unipartite unipolar univalent univocal |