Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* gĕmĭnĭtūdo, ĭnis, f. [geminus], the difference between twins: habeo ego istam qui distinguam inter vos geminitudinem, i. e. mark, Pac. ap. Non. 116, 18 (Trag. Rel. v. 61 Rib.).