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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

chemical, chemical substance go
material produced by or used in a reaction involving changes in atoms or molecules

compound, chemical compound go
(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight

salt go
a compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal)

carbonate go
a salt or ester of carbonic acid (containing the anion CO3)

bicarbonate, hydrogen carbonate go
a salt of carbonic acid (containing the anion HCO3) in which one hydrogen atom has been replaced

potassium bicarbonate, potassium acid carbonate, potassium hydrogen carbonate
a crystalline salt (KHCO3) that is used in baking powder and as an antacid

noun.substance

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