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hepatitis-associated antigen; an antigen that occurs in the blood serum of some people, esp those with serum hepatitis
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
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Examples from the Web for haa
Historical Examples
  • "All the way up t' haa'lem," answered the black man, cordially.

    The Rich Little Poor Boy Eleanor Gates
  • That is all she have done at present, but, ye see, she haan't been here so very long.

    The Woman-Hater Charles Reade
  • Mi faither says as haa snow is th' earth's lappin', and keeps all th' seeds warm, and mak's th' land so as it 'll groo.

    Lancashire Idylls (1898) Marshall Mather
haa in Medicine

HAA abbr.
hepatitis-associated antigen

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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