Dictionary

substantia nigra

noun sub·stan·tia ni·gra \səb-ˌstan(t)-shē-ə-ˈnī-grə, -ˈni-\
plural sub·stan·ti·ae ni·grae \-chē-ˌē-ˈnī-(ˌ)grē, -ˈni-\

Definition of SUBSTANTIA NIGRA

:  a layer of deeply pigmented gray matter situated in the midbrain and containing the cell bodies of a tract of dopamine-producing nerve cells whose secretion tends to be deficient in Parkinson's disease

Origin of SUBSTANTIA NIGRA

New Latin, literally, black substance
First Known Use: circa 1882

substantia nigra

noun sub·stan·tia ni·gra \səb-ˌstan-chē-ə-ˈnī-grə, -ˈnig-rə\   (Medical Dictionary)
plural sub·stan·ti·ae ni·grae \-chē-ˌē-ˈnī-(ˌ)grē, -ˈnig-(ˌ)rē\

Medical Definition of SUBSTANTIA NIGRA

:  a layer of deeply pigmented gray matter situated in the midbrain and containing the cell bodies of a tract of dopamine-producing nerve cells whose secretion tends to be deficient in Parkinson's disease

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