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gtt.

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