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English definition of “dropper”

dropper

noun [C]     /ˈdrɒp.ər/ US  /ˈdrɑː.pɚ/
a small tube with a rubber container at one end that is filled with air and allows liquid to be given out in separate drops Laboratory equipment
(Definition of dropper noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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