† roche petren.

Forms: 1600s–1700s rochpeter, 1600s rochpeeter, 1700s rochpetre.

Origin: Formed within English, by compounding. Etymons: roche n.¹, petre n.²

Etymology: < roche n.¹ + petre n.², after salpetre n. Compare later roched petre n. at roched adj., rock petre n.

Obsolete.

Native saltpetre (potassium nitrate), esp. as found crystallized on the surface of rocks. Cf. peter in roche n. at roche n.¹ Phrases and roched adj.

ΘΚΠ

the world > the earth > minerals > types of mineral > nitrates > [noun] > potassium nitrate

nitrumOE

salpetrec1325

sal-nitre1416

saltpetre1501

peter in roche1554

salt nitre1601

nitre1617

roche petre1634

rock petre1667

Smyrna earth1735

nitre crystal1869

1634 J. Bate Myst. Nature & Art 54 The ingredients likewise are chiefly these, Saltpeter, Rochpeter, Sulpher.

1665 Philos. Trans. (Royal Soc.) 1 36 A fine white Salt, which..seemed to have Sides and Angles in the same number and figure as Rochpeeter.

1765 R. Jones New Treat. Artific. Fireworks ii. 36 Rochpetre four ounces.

This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2021).

单词	roche petre
释义	† roche petren. Forms: 1600s–1700s rochpeter, 1600s rochpeeter, 1700s rochpetre. Origin: Formed within English, by compounding. Etymons: roche n.¹, petre n.² Etymology: < roche n.¹ + petre n.², after salpetre n. Compare later roched petre n. at roched adj., rock petre n. Obsolete. Native saltpetre (potassium nitrate), esp. as found crystallized on the surface of rocks. Cf. peter in roche n. at roche n.¹ Phrases and roched adj. ΘΚΠ the world > the earth > minerals > types of mineral > nitrates > [noun] > potassium nitrate nitrumOE salpetrec1325 sal-nitre1416 saltpetre1501 peter in roche1554 salt nitre1601 nitre1617 roche petre1634 rock petre1667 Smyrna earth1735 nitre crystal1869 1634 J. Bate Myst. Nature & Art 54 The ingredients likewise are chiefly these, Saltpeter, Rochpeter, Sulpher. 1665 Philos. Trans. (Royal Soc.) 1 36 A fine white Salt, which..seemed to have Sides and Angles in the same number and figure as Rochpeeter. 1765 R. Jones New Treat. Artific. Fireworks ii. 36 Rochpetre four ounces. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2021). < n.1634
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