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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

body go
an individual 3-dimensional object that has mass and that is distinguishable from other objects

particle, subatomic particle go
a body having finite mass and internal structure but negligible dimensions

fermion go
any particle that obeys Fermi-Dirac statistics and is subject to the Pauli exclusion principle

baryon, heavy particle go
any of the elementary particles having a mass equal to or greater than that of a proton and that participate in strong interactions

nucleon go
a constituent (proton or neutron) of an atomic nucleus

antiproton
an unstable negatively charged proton

noun.object

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