Leptotrichia

[lĕp′tō-trĭkē-ə]
n.
  1. A genus of anaerobic, gram-negative, filamentous bacteria that naturally occur in the oral cavity but can occur in the genitourinary tract.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.