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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

natural object go
an object occurring naturally

sample go
all or part of a natural object that is collected and preserved as an example of its class

specimen go
a bit of tissue or blood or urine that is taken for diagnostic purposes

cytologic specimen go
a specimen used for cytologic examination and diagnosis

smear, cytologic smear, cytosmear go
a thin tissue or blood sample spread on a glass slide and stained for cytologic examination and diagnosis under a microscope

lower respiratory tract smear, bronchoscopic smear, sputum smear
any of several cytologic smears obtained from different parts of the lower respiratory tract

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