Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pannōsĭtas, ātis, f. [pannosus], raggedness, flabbiness: cutis veluti ruginosa vel sulcata pannositas, quam Graeci ῤάκωσιν vocant, Cael. Aur. Acut. 1, 11, 86.