Meanings
nounhornstone (countable and uncountable, plural hornstones)
plural hornstones
- countableuncountablehornfels
Synonyms & antonyms
nouna fine-grained metamorphic rock formed by the action of heat on clay rocks
Similar
Broader
Also see
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
From horn + stone, translation of hornfels.
Full word history & related roots →Cite this entry
APA
hornstone. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/hornstone
MLA
“hornstone.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/hornstone. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “hornstone,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/hornstone.
Source: hornstone on Wiktionary, CC BY-SA 4.0.