Gray substance



gray substance n.
See gray matter.

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    gray syndrome or gray-baby syndrome n. A potentially fatal syndrome of infants caused by transplacental effects of chloramphenicol administered to the mother and resulting in the infant’s gray appearance at birth and during the neonatal period. Also called gray-baby syndrome.

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    noun 1. a common weakfish, Cynoscion regalis, inhabiting Atlantic and Gulf coastal waters of the U.S.



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    noun 1. a smooth, urn-shaped edible mushroom, Urnula craterium, commonly found in North America on fallen hardwood.

  • Graywacke

    [grey-wak, -wak-uh] /ˈgreɪˌwæk, -ˌwæk ə/ noun 1. Geology. a dark-gray coarse-grained wacke. graywacke (grā’wāk’, -wāk’ə) Any of various dark gray, coarse-grained sandstones that contain abundant feldspar and rock fragments and often have a clay-rich matrix. Graywackes are thought to originate in environments where erosion, transportation, and deposition happen so quickly that minerals and rock fragments […]



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