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| thumb·nail [ thúm nàyl ] |
noun (plural thumb·nails) |
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1. nail of thumb: the hard growing plate of keratin on the surface of the tip of the thumb
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2. comput miniature graphic image: a small version of a larger graphic image displayed on a computer monitor so as to save space
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adjective |
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concise: covering the salient points concisely
 a thumbnail sketch
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