Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
hāmŭlus, i, m. dim. [hamus], a small hook: piscarius, a small angle, Plaut. Stich. 2, 1, 17.
As a surgical instrument, Cels. 7, 7, 4 and 7.