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单词 roche petre
释义 roche petre Obs.
In 7 rochpeter, rochpeeter, roch-peter.
[f. roche n.1 + petre.]
Native saltpetre, occurring as an efflorescence on rocks.
1634J. B[ate] Myst. Nature 54 The ingredients likewise are chiefly these, Saltpeter, Rochpeter, Sulpher.1665Phil. Trans. I. 36 A fine white Salt, which..seemed to have Sides and Angles in the same number and figure as Rochpeeter.1669Sturmy Mariner's Mag. v. xiii. 87 Roch-Peter.., Quick-Brimstone.., and fine Powder-dust.
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