primary syphilis

noun Pathology.
the first stage of syphilis, characterized by the formation of a chancre at the site of infection.

1900–05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

primary syphilis n.
The first stage of syphilis, marked by formation of a painless chancre at the point of infection and by hardening and swelling of adjacent lymph nodes.

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