seronegative

[seer-oh-neg-uh-tiv]
adjective Medicine/Medical.
  1. showing no significant level of serum antibodies, or other immunologic marker in the serum, that would indicate previous exposure to the infectious agent being tested.

Origin of seronegative

First recorded in 1930–35; sero- + negative
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for seronegative

seronegative

adjective
  1. (of a person whose blood has been tested for a specific disease, such as AIDS) showing no serological reaction indicating the presence of the disease
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

seronegative in Medicine

seronegative

[sîr′ō-nĕgə-tĭv]
adj.
  1. Having a negative reaction to a serological test for a disease, especially to a test for syphilis or AIDS.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.