substantia nigra

noun
sub·​stan·​tia ni·​gra | \ səb-ˌstan(t)-shē-ə-ˈnī-grə How to pronounce substantia nigra (audio) , -ˈni- \
plural substantiae nigrae\ səb-​ˌstan(t)-​chē-​ˌē-​ˈnī-​(ˌ)grē How to pronounce substantiae nigrae (audio) , -​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

First Known Use of substantia nigra

1809, in the meaning defined above

History and Etymology for substantia nigra

New Latin, literally, black substance

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The first known use of substantia nigra was in 1809

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Cite this Entry

“Substantia nigra.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/substantia%20nigra. Accessed 20 January 2020.

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More Definitions for substantia nigra

substantia nigra

noun
sub·​stan·​tia ni·​gra | \ səb-ˌstan-chē-ə-ˈnī-grə How to pronounce substantia nigra (audio) , -ˈnig-rə How to pronounce substantia nigra (audio) \
plural substantiae nigrae\ -​chē-​ˌē-​ˈnī-​(ˌ)grē How to pronounce substantiae nigrae (audio) , -​ˈnig-​(ˌ)rē How to pronounce substantiae nigrae (audio) \

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

More from Merriam-Webster on substantia nigra

Britannica.com: Encyclopedia article about substantia nigra

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