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| jump·ing spi·der (plural jump·ing spi·ders) |
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| Definition: |
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spider that leaps on prey: a spider that fixes on its prey using an enlarged central pair of eyes, then pounces by rapidly extending its legs. The jumping is a result of a sudden increase in blood pressure, which causes the legs to extend rapidly, and the spiders can achieve distances of several inches. Family Salticidae.
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