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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

thing go
a separate and self-contained entity

unit, building block go
a single undivided natural thing occurring in the composition of something else

molecule go
(physics and chemistry) the simplest structural unit of an element or compound

macromolecule, supermolecule go
any very large complex molecule

protein go
any of a large group of nitrogenous organic compounds that are essential constituents of living cells

antibody
any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response

noun.substance

11 Subcategories

autoantibody go
an antibody acting against tissues of the organism that produces it
precipitin go
an antibody that causes precipitation when it unites with its antigen
ABO antibodies go
blood type antibodies
Rh antibody go
rhesus factor antibody
antitoxin go
an antibody that can neutralize a specific toxin
agglutinin go
an antibody that causes agglutination of a specific antigen
heterophil antibody, heterophile antibody, Forssman antibody go
an antibody found in the blood of someone suffering from infectious mononucleosis
isoantibody, alloantibody go
an antibody that occurs naturally against foreign tissues from a person of the same species
monoclonal antibody, monoclonal go
any of a class of antibodies produced in the laboratory by a single clone of cells or a cell line and consisting of identical antibody molecules
opsonin go
an antibody in blood serum that attaches to invading microorganisms and other antigens to make them more susceptible to the action of phagocytes
immunoglobulin, Ig, immune serum globulin, immune gamma globulin, immune globulin go
a class of proteins produced in lymph tissue in vertebrates and that function as antibodies in the immune response