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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

elementary particle, fundamental particle go
(physics) a particle that is less complex than an atom

quark
(physics) hypothetical truly fundamental particle in mesons and baryons

noun.object

6 Subcategories

bottom quark, beauty quark go
a quark with a charge of -1/3 and a mass about 10,000 times that of an electron
charm quark go
a quark with an electric charge of +2/3 and a mass 2900 times that of an electron and a charm of +1
down quark go
a stable quark with an electric charge of -1/3 and a mass 607 times that of an electron
strange quark, squark go
a quark with an electric charge of -1/3 and a mass 988 times that of an electron and a strangeness of -1
top quark, truth quark go
a hypothetical quark with a charge of +2/3 and a mass more than 100,000 times that of an electron
up quark go
a stable quark with an electric charge of +2/3 and a mass 607 times that of an electron