from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A flat metal plate for gauging the accuracy of a plane surface in precision metalworking. Also called surface plate.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A flat, metal plate used for estimating the flatness of a machined part; a surface plate
from the GNU version of the Collaborative International Dictionary of English
- n. An instrument for gauging or testing a plane surface. See Surface gauge, under surface.
from The Century Dictionary and Cyclopedia
- n. A plane surface used in machine-making as a gage for plane surfaces; a surface-plate.
Sorry, no etymologies found.