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adj. also a·zy·gous (-gəs)
Not one of a pair, as a vein or muscle; occurring singly.
An unpaired anatomical structure.
a biological structure not in a pair
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|Adj.||1.||azygos - occurring singly; not one of a pair; "the azygous muscle of the uvula"|
single - existing alone or consisting of one entity or part or aspect or individual; "upon the hill stood a single tower"; "had but a single thought which was to escape"; "a single survivor"; "a single serving"; "a single lens"; "a single thickness"