Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A very hard, dense, even-textured, silica-bearing sedimentary rock used in whetstones.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A form of chert, very rich in quartz, that has been used to make whetstones

from the GNU version of the Collaborative International Dictionary of English

  • n. A variety of siliceous slate, of which hones are made; razor stone; Turkey stone; hone stone; whet slate.

from The Century Dictionary and Cyclopedia

  • A very hard, fine-grained rock, used for hones: same as honestone. It is a very silicious variety of clay slate.

Etymologies

Latin novācula, razor + -ite1.
(American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

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