touch-stone

[tuhch-stohn]

touch·stone

[tuhch-stohn]
noun
1.
a test or criterion for the qualities of a thing.
2.
a black siliceous stone formerly used to test the purity of gold and silver by the color of the streak produced on it by rubbing it with either metal.

Origin:
1475–85; touch + stone


1. standard, measure, model, pattern.

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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Touch-stone is always a great word to know.
So is lollapalooza. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a stew of meat, vegetables, potatoes, etc.
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