IgG

noun

\ ˌī-(ˌ)jē-ˈjē

Definition of IgG

1 : a class of immunoglobulins including the most common antibodies circulating in the blood that facilitate the phagocytic destruction of microorganisms foreign to the body, that bind to and activate complement, and that are the only immunoglobulins to cross over the placenta from mother to fetus

2 : an antibody of the class IgG

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The first known use of IgG was in 1965

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IgG

noun

\ ˌī-ˌjē-ˈjē

Medical Definition of IgG

1 : a class of immunoglobulins that include the most common antibodies circulating in the blood, that facilitate the phagocytic destruction of microorganisms foreign to the body, that bind to and activate complement, and that are the only immunoglobulins to cross over the placenta from mother to fetus

2 : an immunoglobulin of the class IgG