Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. spĕcŭlātus, a, um, Part. of speculor.
* 2. spĕcŭlātus, a, um, adj. [speculum], furnished or adorned with mirrors: cubiculum, Gloss. ap. Suet. Vit. Hor.