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streak |
Also found in: Dictionary/thesaurus, Medical, Legal, Idioms, Wikipedia, Hutchinson | 0.03 sec. |
streakColour of a mineral in its powdered form, usually obtained by rubbing the mineral on a hard, white surface (e.g., a tile of unglazed porcelain) to yield a streak of fine powder. The streak's colour is usually constant for a given mineral, even if the mineral varies in colour as it occurs in the field or if the streak is different from the colour of the unpowdered mineral. Streak is diagnostically useful because it may distinguish between mineral species that are otherwise similar in appearance. streak 1. a. (of lightning) a sudden flash b. (as modifier): streak lightning 2. Mineralogy the powdery mark made by a mineral when rubbed on a hard or rough surface: its colour is an important distinguishing characteristic streak [strēk] (mineralogy) The color of a powdered mineral, obtained by rubbing the mineral on a streak plate. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| He was quite willing to satisfy our curiosity, and in a few minutes we learned that the Streak had come in after dark from San Francisco; that this was what might be called the trial trip; and that she was the property of Silas Tate, a young mining millionaire of California, whose fad was high-speed yachts. At seventeen feet they struck a thin streak of gravel, and in it coarse gold, testpans running as high as six and eight dollars. It seemed as if stirred by a streak of wind, which not only bent it, but pressed it down--crushed it so that it did not rise; and this movement was slowly prolonging itself directly toward us. |
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