Meaning of substantia nigra

sub•stan•ti•a ni•gra

Pronunciation: (sub-stan'shē-u nī'gru, nig'ru), [key]
— pl. sub•stan•ti•ae ni•grae substantia nigras.
  1. a deeply pigmented area of the midbrain containing dopamine-producing nerve cells.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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