A scientific instrument designed to measure the elasticity or spring-like properties of materials or substances.
Compound from 'elater' (spring/driver) plus '-meter' (measuring device), from Greek 'metron' meaning measure. The term describes an apparatus for quantifying elastic or resilient properties of substances.
This is the kind of specialized scientific instrument that probably hasn't been manufactured since the 1920s, yet the word remains in technical dictionaries—a ghost of early materials science when physicists were obsessed with measuring every material property imaginable.
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