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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

matter go
that which has mass and occupies space

substance go
the real physical matter of which a person or thing consists

material, stuff go
the tangible substance that goes into the makeup of a physical object

conductor
a substance that readily conducts e.g. electricity and heat

noun.substance

3 Subcategories

copper, Cu, atomic number 29 go
a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element
silver, Ag, atomic number 47 go
a soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal
semiconductor, semiconducting material go
a substance as germanium or silicon whose electrical conductivity is intermediate between that of a metal and an insulator