noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A device used to measure the rate of respiration of living organisms, such as plants or fish.
2. 2
   An apparatus for supplying air to a diver under water.

Etymology

From respire + -o- + -meter.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.