hornstone


Also found in: Thesaurus, Encyclopedia, Wikipedia.

hornstone

(ˈhɔːnˌstəʊn)
n
(Minerals) another name for chert, hornfels
[C17: translation of German Hornstein; so called from its appearance]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hornstone - a fine-grained metamorphic rock formed by the action of heat on clay rocks
metamorphic rock - rock altered by pressure and heat
References in periodicals archive ?
The aggregate obtained though the breaking up of hornstone, ie silified limestone, has also been used in tests.
This variety of hornstone I have seen in every part of New England in the form of Indian arrow-heads, hatchets, chisels, etc.
There are horned vipers, hornworms, hornworts, hornstones, hornbeam shrubs, and hornbilled birds.