Webster's Revised Unabridged Dictionary · 1913

Hornstone

Hornstone , noun

(Mineralogy) A siliceous stone, a variety of quartz, closely resembling flint, but more brittle; -- called also chert.

Text from the public-domain GNU Collaborative International Dictionary of English, derived from Webster's Revised Unabridged Dictionary (1913). Definitions marked with were added by later GCIDE contributors and are not in the original 1913 edition.

Enjoying the dictionary? Support its upkeep.

Contribute on GitHub, or report issues.