Also found in: Idioms.
Gray(grā), Asa 1810-1888.
American botanist who greatly enlarged and improved the description of North American flora and was the chief American advocate of Charles Darwin's theories.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.