- an immunoglobulin of unusually high relative molecular mass, observed in the blood in some diseases
- Also called: immunoglobulin M the normal form of this immunoglobulin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- A plasma globulin of high molecular weight.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.