Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† lĕpas (lŏpas, Non. 551, 5), ădis, f., = λεπάς, a kind of shell-fish that adheres closely to rocks, a limpet: lopades genus conchae marinae, Non. l. l.: lepadas (lopadas, acc. to Non.), ostreas, captamus, Plaut. Rud. 2, 1, 8; id. Cas. 2, 8, 57.