rutile


Concise Oxford English Dictionary © 2008 Oxford University Press:
rutile /ˈruːtɪl, ˈruːtʌɪl/
noun a black or reddish-brown mineral consisting of titanium dioxide, typically occurring as needle-like crystals.
– origin C19: from Fr., or from Ger. Rutil, from L. rutilus ‘reddish’.
'rutile' also found in these Oxford entries:

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