ROTTENSTONE

rottenstone, tripoli

(noun) a weathered and decomposed siliceous limestone; in powdered form it is used in polishing

Source: WordNet® 3.1

Etymology

Noun

rottenstone (countable and uncountable, plural rottenstones)

(geology) A soft, friable limestone, used in polishes.

Verb

rottenstone (third-person singular simple present rottenstones, present participle rottenstoning, simple past and past participle rottenstoned)

(transitive) To polish with rottenstone.

Source: Wiktionary

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