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Definition of gtt.

gtt.: Abbreviation meaning drops (from the Latin "guttae", drops). One of a number of hallowed abbreviations of Latin terms that have traditionally been used in prescriptions.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=8356
Last Editorial Review: 2/19/1999 2:58:00 PM

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