Suction-cup

suction cup

noun
a cup-shaped object of rubber, glass, plastic, etc., which, by producing a partial vacuum, can be made to adhere to or draw something to a surface.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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suction cup

noun
a cup-shaped device (made of rubber, glass, or plastic) that produces a partial vacuum; used to adhere or draw something to a surface 
WordNet® 3.0, © 2006 by Princeton University.
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