prosthokeratoplasty Surgical replacement of diseased or scarred corneal tissue (as with a cataract) with an inert transparent prosthesis. Related word families intertwined with 'to place, placing, to put; to add; to stay; to attach' word units: fix-; pon-; stato-; the-, thes-. Found on http://www.wordinfo.info/words/index/info/view_unit/3336/