Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
‡ allus, i, m.: pollex scandens proximum digitum, quod velut insiluisse in alium videtur, quod Graece ἅλλεσθαι dicitur, Paul. ex Fest. p. 7 Müll.; kindr. with allex, q. v.