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TAKE THE QUIZ“nigra”
The following 3 entries include the term nigra.
substantia nigra
noun: 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
lotio nigra
nounnigra scale
noun: a coccid (Saissetia nigra) that is a serious pest on cotton, coffee, and other plants of warm temperate regions
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Merriam-Webster unabridged
