doxycycline definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A broad-spectrum antibiotic, C22H24N2O8, derived from tetracycline.
Origin: d(e)oxy- + (tetra)cycline.
doxycycline - Medical Definition
An antibacterial derived from tetracycline.