pertaining to or associated with digestion; digestive.
promoting digestion.
of or pertaining to pepsin.
a substance promoting digestion.

1645–55; < Greek peptikós conducive to digestion, equivalent to pept(ós) digested (verbid of péptein) + -ikos -ic Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
peptic (ˈpɛptɪk)
1.  of, relating to, or promoting digestion
2.  of, relating to, or caused by pepsin or the action of the digestive juices
[C17: from Greek peptikos capable of digesting, from pepsis digestion, from peptein to digest]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1651, from L. pepticus, from Gk. peptikos "able to digest," from peptos "cooked, digested," verbal adj. of peptein "to cook."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

peptic pep·tic (pěp'tĭk)

  1. Relating to or assisting digestion.

  2. Associated with the action of digestive secretions.

  3. Of or involving pepsin.

  4. Capable of digesting.

A digestive agent.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
peptic   (pěp'tĭk)  Pronunciation Key 
  1. Relating to the process of digestion or the secretions associated with it.

  2. Relating to or involving pepsin.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Though many of the infected show no symptoms, others develop peptic ulcer
  disease or one of several types of cancer.
H pylori has been linked to the development of peptic ulcers and gastric cancer
  in adults after their third decade.
The operation became the standard treatment for peptic ulcers for the next
  twenty-five years.
He suffers from a peptic ulcer and also from chronic inflammation of the
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