Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pĕcūlĭātus, a, um, Part. and P. a., from peculio.
pĕcūlĭo, āvi, ātum, 1, v. a. [peculium], to give one something for one’s self, as one’s private property; hence, comic. in mal. part., Plaut. Pers. 2, 2, 10.
Hence, pĕ-cūlĭātus. a, um, P. a., furnished with property of his own, that has private property.