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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
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physical entity go
an entity that has physical existence
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object, physical object go
a tangible and visible entity
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whole, unit go
an assemblage of parts that is regarded as a single entity
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artifact, artefact go
a man-made object taken as a whole
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instrumentation, instrumentality go
an artifact (or system of artifacts) that is instrumental in accomplishing some end
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device go
an instrumentality invented for a particular purpose
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optical device go
a device for producing or controlling light
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lens, lense, lens system go
a transparent optical device used to converge or diverge transmitted light and to form images
compound lens
a lens system consisting of two or more lenses on the same axis
noun.artifact

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