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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

filter
device that removes something from whatever passes through it

noun.artifact

12 Subcategories

air filter, air cleaner go
a filter that removes dust from the air that passes through it
bacteria bed go
layer of sand or gravel used to expose sewage effluent to air and the action of microorganisms
coffee filter go
filter (usually of paper) that passes the coffee and retains the coffee grounds
drain basket go
a filter in a sink drain
filter bed go
filter consisting of a layer of sand or gravel for filtering water
fuel filter go
a filter in the fuel line that screens out dirt and rust particles from the fuel
light filter, diffusing screen go
a transparent filter that reduces the light (or some wavelengths of the light) passing through it
oil filter go
a filter that removes impurities from the oil used to lubricate an internal-combustion engine
strainer go
a filter to retain larger pieces while smaller pieces and liquids pass through
water filter go
a filter to remove impurities from the water supply
glass wool go
glass fibers spun and massed into bundles resembling wool
diatomaceous earth, diatomite, kieselguhr go
a light soil consisting of siliceous diatom remains and often used as a filtering material