A device or instrument that measures or records decreases or reductions in quantity.
Combination of 'decrement' (from Latin 'decrementum') and '-meter' (from Greek 'metron,' meaning measure). This is an extremely rare or specialized technical term.
While 'decremeter' sounds official, it's so obscure that most scientists and engineers have never actually used this word—it's more of a theoretical possibility than a real instrument!
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