Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
stĭpŭlātus, ūs, m. [stipulor], jurid. t. t., a promise formally demanded; a bargain, stipulation, Quint. Decl. 12, 21: si quid adversus pactionem fiat, non ex stipulatu agitur, etc., Gai. Inst. 3, 94; 4, 116; Dig. 45, 1, 1; 45, 1, 4 sq.; 45, 1, 103 sq.; Paul. Sent. 5, 7, 2 sq. al.