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Definition of: cirrus
(sir′əs) noun plural cir·ri (sir′ī)
1. Meteorol.
A type of white, wispy cloud, usually consisting of ice crystals and having an average height of 7 miles, seen in tufts or feathery–shaped bands across the sky.
2. Bot. A tendril.
3. Zool. A threadlike appendage serving as an organ of touch. [<L, ringlet]
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