from The Century Dictionary.
- noun In founding, excess in the size of a casting over the size of the pattern, due to the fact that the pattern has been rapped too hard when drawing it from the sand, so that the hole it left in the mold was larger than the pattern itself.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Founding) The enlargement of a mold caused by rapping the pattern.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The
enlargementof a mouldcaused by rappingthe pattern.
from Wiktionary, Creative Commons Attribution/Share-Alike License
rap + -age
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