gtt.

Origin of gtt.

From the Latin word guttae
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

gtt. in Medicine

gtt.

abbr.
  1. guttae (drops)
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.