Test your vocabulary with our 10-question quiz!
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
Love words? Need even more definitions?
Merriam-Webster unabridged
