proefballon

Dutch

Etymology

proef 'test' + ballon 'balloon'

Pronunciation

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Noun

proefballon m (plural proefballonnen, diminutive proefballonnetje n)

1. A balloon used as a probe or to carry some test - or experimental device
2. (figuratively) (often in the diminutive: proefballonnetje) A feeler, kite, to test reactions