Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Ŏcella, ae, m. [ocellus, small-eyed], a Roman surname, Cic. Att. 10, 17, 3; 10, 17, 2; Plin. 11, 37, 55, § 150; Suet. Galb. 4; Inscr. Grut. 431, 2.