- 1. n. A siliceous stone, a variety of quartz, closely resembling flint, but more brittle; -- called also chert. Source: opted
- 2. n. a fine-grained metamorphic rock formed by the action of heat on clay rocks Source: wordnet
- 3. A siliceous stone, a variety of quartz, closely resembling flint, but more brittle; -- called also chert. Source: webster
- 4. A siliceous stone, a variety of quartz, closely resemblingflint, but more brittle; -- called also chert. Source: adambom
- 5. n a fine-grained metamorphic rock formed by the action of heat on clay rocks Source: ecdict
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hornstone
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brittlecalledchertcloselyquartzsiliceousstonevarietyactionclayfine-grainedflintformedheatmetamorphicresemblingrockrocks