Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. Maecĭus, a, the name of a Roman gens. So, Sp. Maecius Tarpa, Cic. Fam. 7, 1, 1; Hor. A. P. 387; id. S. 1, 10. 38 Orell. ad loc.
2. Maecĭus (Mētĭus), i, m.,