shale

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noun \ˈshāl\

Definition of shale

  1. :  a fissile rock that is formed by the consolidation of clay, mud, or silt, has a finely stratified or laminated structure, and is composed of minerals essentially unaltered since deposition

shaley

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shaly

\ˈshā-lē\ adjective

Origin and Etymology of shale

probably from obsolete or dialect shale scale, shell, from Middle English, from Old English scealu — more at shell


First Known Use: 1747


SHALE Defined for English Language Learners

shale

play
noun \ˈshāl\

Definition of shale for English Language Learners

  • : a soft kind of rock that splits easily into flat pieces


SHALE Defined for Kids

shale

play
noun \ˈshāl\

Definition of shale for Students

  1. :  a rock with a fine grain formed from clay, mud, or silt


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