par·get 
(pärjĭt)
(pärjĭt)n.
1. A mixture, such as plaster or roughcast, used to coat walls and line chimneys.
2. Ornamental work in plaster.
3. A cement mixture used to waterproof outer walls.
tr.v. par·get·ed, par·get·ing, par·gets also par·get·ted or par·get·ting
To cover or adorn with parget.
[Middle English, probably from pargetten, to parget, from Old French pargeter, parjeter, to throw about (par-, intensive pref. from Latin per; see per1 in the Appendix of Indo-European roots + jeter, to throw, from Latin iactāre, frequentative of iacere; see yē- in the Appendix of Indo-European roots) and from Old French porgeter, to roughcast a wall (por-, forward ultimately from Latin porrō; see per1 in the Appendix of Indo-European roots + iactāre, to throw).]
parget·ing n.
pargetdetail of a ceiling at No. 10 Downing Street, London, the home of the prime minister of the United Kingdom