Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Andrĭus, a, um, adj., born at Andros, one of the Cyclades, Ter. And. 5, 4, 3.
Hence, Andrĭa, ae. f., a woman of Andros; The Maid of Andros, a comedy by Terence.