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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

object, physical object go
a tangible and visible entity

whole, unit go
an assemblage of parts that is regarded as a single entity

artifact, artefact go
a man-made object taken as a whole

instrumentation, instrumentality go
an artifact (or system of artifacts) that is instrumental in accomplishing some end

device go
an instrumentality invented for a particular purpose

electrical device go
a device that produces or is powered by electricity

transducer go
an electrical device that converts one form of energy into another

electro-acoustic transducer go
a transducer that converts electrical to acoustic energy or vice versa

microphone, mike go
device for converting sound waves into electrical energy

crystal microphone
a microphone in which sound waves vibrate a piezoelectric crystal that generates a varying voltage

noun.artifact

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