from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A cylindrical saw with teeth on the bottom edge of the cylinder, used for cutting round holes.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A
sawin the form of a hollow cylinderwith teethon the end or edge, operated by rotation.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a saw having teeth around the edge of a hollow cylinder
from Wiktionary, Creative Commons Attribution/Share-Alike License
From its supposed resemblance to a crown (worn on the head).
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