Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
cătŭlītĭo, or contr. catlītĭo, ōnis, f. [catulio], a desire for the male; trop. of nature (gestiente natură semina accipere), a rustic expression, Plin. 16, 25, 39, § 94.