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Pyroxene

/ˈpaɪrɒksiːn/noun

A major group of dark rock-forming silicates, abundant in basalt, gabbro and many meteorites.

The Greek roots

πῦρ
pŷr
fire
+
ξένος
xénos
stranger, guest

Literally: stranger to fire

The story of the word

René Just Haüy named it in 1796 on a mistake. Seeing the crystals embedded in lava, he decided they were foreigners caught up in the flow rather than natives of it, and gave them a name meaning strangers in the fire. They crystallise directly out of the melt, so they are as native as anything in the rock, and the name has outlived the theory by two centuries. ξένος also gives xenophobia and xenon, the gas Ramsay called 'the stranger' in 1898.

How it travelled
Ancient Greek → French coinage → English
First recorded
19th century

Same family

pyrepyrotechnicsxenonxenophobia

In a sentence

Under the microscope the pyroxene shows its stubby right-angled cleavage.

Built on the same root

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