n. 1. A skin lesion consisting of a hair follicle that is occluded with sebum and keratin, appearing white at the surface. 2. See milium. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
British mathematician and philosopher. A founder of mathematical logic, he wrote Principia Mathematica (1910-1913) with Bertrand Russell and Process and Reality (1929). |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.