SG Heritage Dictionary

Slaty [Adjective] Webster's Dictionary 1828

Resembling slate; having the nature or properties of slate; as a slaty color or texture; a slaty feel.

Slaty [Adjective] Webster's Dictionary 1913

Resembling slate; having the nature, appearance, or properties, of slate; composed of thin parallel plates, capable of being separated by splitting; as, a slaty color or texture.