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spot |
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spot, fish: see croaker croaker, member of the abundant and varied family Sciaenidae, carnivorous, spiny-finned fishes including the weakfishes, the drums, and the whitings. The croaker has a compressed, elongated body similar to that of the bass. ..... Click the link for more information. . spot 1. a geographical area that is restricted in extent 2. a blemish of the skin, esp a pimple or one occurring through some disease 3. a position or length of time in a show assigned to a specific performer 4. short for spotlight 5. in billiards a. the white ball that is distinguished from the plain by a mark or spot b. the player using this ball 6. Billiards snooker one of several small black dots on a table that mark where a ball is to be placed 7. Commerce a. denoting or relating to goods, currencies, or securities available for immediate delivery and payment b. involving immediate cash payment Spot dog accompanying Sally, Dick, and Jane in primers. [Am. Cult.: Misc.] See : Dogs |
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High-Power transmission target has an interaction layer of tungsten and a special backing layer that provides improved heat transfer and lower focal spot temperature. Even at such high magnifications the latest 1000 x 1000 pixel detectors can easily resolve the resulting x-ray images, so image resolution depends almost entirely on focal spot size of the x-ray source. The lens system would be even more effective at longer wavelengths were it not for the spreading of the focal spot in the vertical direction due to gravity. |
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