relief tube

noun

A tube built into an aircraft allowing the crew to urinate while in flight.

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Meanings

nounrelief tube (plural relief tubes)

plural relief tubes

  1. historicalaeronauticsA tube built into an aircraft allowing the crew to urinate while in flight.
Cite this entry
APA

relief tube. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/relief%20tube

MLA

“relief tube.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/relief%20tube. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “relief tube,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/relief%20tube.

Source: relief tube on Wiktionary, CC BY-SA 4.0.