The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
n. A unit of acoustic absorption equivalent to the absorption by one square foot of a surface that absorbs all incident sound. [After Wallace Clement Ware Sabine (1868-1919), American physicist.] |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
Polish-born American microbiologist and physician who developed a live-virus vaccine against poliomyelitis, publicly introduced in 1962. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.