dead space

noun
Updated on: 25 Mar 2018

Definition of dead space

: the portion of the respiratory system which is external to the bronchioles and through which air must pass to reach the bronchioles and alveoli

Recent Examples of dead space from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dead space.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of dead space

circa 1923

in the meaning defined above

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Medical Dictionary

dead space

noun

medical Definition of dead space

1 : space in the respiratory system in which air does not undergo significant gaseous exchange — see anatomical dead space, physiological dead space
2 : a space (as that in the chest following excision of a lung) left in the body as the result of a surgical procedure

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