The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
n. Abbr. Gy The SI unit for the energy absorbed from ionizing radiation, equal to one joule per kilogram. [After Louis Harold Gray (1905-1965), British radiobiologist.] |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
British poet considered a forerunner of English romanticism. His most famous work is "Elegy Written in a Country Churchyard" (1751). |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
American trader and sea captain who twice circumnavigated the globe (1787-1790 and 1790-1793), and explored the mouth of the previously uncharted Columbia River (1792). |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
American botanist who greatly enlarged and improved the description of North American flora and was the chief American advocate of Charles Darwin's theories. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.