Anatomy. nerve tissue, especially of the brain and spinal cord, that contains fibers and nerve cell bodies and is dark reddish-gray.
Informal. brains or intellect.
gray matter n.
Brownish-gray nerve tissue, especially of the brain and spinal cord, composed of nerve cell bodies and their dendrites and some supportive tissue. Also called gray substance, substantia grisea.
The brownish-gray tissue of the vertebrate brain and spinal cord, made up chiefly of the cell bodies and dendrites of neurons. Compare white matter.
Intelligence; brains, smarts (1899+)
Brains, intellect, as in If you’d only use your gray matter, you’d see the answer in a minute. This expression refers to actual brain tissue that is gray in color. Agatha Christie’s fictional detective, Hercule Poirot, constantly alludes to using the little gray cells for solving a crime. [ Late 1800s ]
noun 1. a disease of plants, characterized by a gray, furry coating on the decaying parts, caused by any of several fungi. 2. any fungus causing this disease, as Botrytis cinerea.
- Gray mule
Related Terms white mule
noun 1. 1 (def 1).
noun 1. a sand shark, Odontaspis arenarius, abundant in S African and Australian coastal waters and estuaries.