
• (n.) The first coating of plaster in work of three coats upon laths. Its surface is scratched once to form a better key for the next coat. In the United States called scratch coat.
Found on
http://thinkexist.com/dictionary/meaning/pricking-up/
Prick'ing-up noun (Architecture) The first coating of plaster in work of three coats upon laths. Its surface is scratched once to form a better key for the next coat. In the United States called
scratch coat .
Brande & C. Found on
http://www.encyclo.co.uk/webster/P/159

In architecture pricking-up is the first coating of plaster in work of three coats upon laths. Its surface is scratched once to form a better key for the next coat.
Found on
http://www.probertencyclopaedia.com/browse/TP.HTM
No exact match found.