air bell

noun

Definition of air bell

1 :a hollow inverted vessel (such as a diving bell or bell jar)
  • An air bell was used in the construction of one of the new piers for the Baltimore & Ohio R. R. bridge over the Allegheny River at Pittsburgh, Pa.
  • Engineering and ContractingJuly–December 1922
2 :an air bubble
3 :an undeveloped spot on a negative or print caused by the adherence of an air bubble to the film surface during development

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First Known Use of air bell

1782


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