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单词 rock cotton
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> as lemmas

rock cotton
rock cotton n. now rare any of various fine, matted, fibrous materials made from mineral matter; = rockwool n.In quot. 1840: asbestos.
ΚΠ
1840 A. Gesner 2nd Rep. Geol. Surv. New-Brunswick 22 Asbestos, (commonly called by the inhabitants rock cotton) and chlorite, occur here in the quartzose veins.
1875 J. W. Dawson Life's Dawn on Earth ii. 21 A vein of fibrous serpentine, yielding ‘rock cotton’, for packing steam pistons.
1908 O. Erf in L. H. Bailey Cycl. Amer. Agric. III. ii. viii. 237/1 The materials that comply with these conditions are rock cotton or mineral wool.
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