A scientific instrument used to measure the rate or degree of effusion, particularly the flow of gases through small openings.
Compound of 'effusion' and the Greek suffix '-meter' (to measure). This technical term combines the Latin root for pouring with the scientific measuring suffix.
This is a real scientific instrument used in chemistry and materials science, and it's a perfect example of how scientific jargon takes old Latin words and combines them with Greek measurement suffixes to describe modern discoveries.
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