ATP

Biochemistry. adenosine triphosphate: an ester of adenosine and triphosphoric acid, C 10 H 12 N 5 O 4 H 4 P 3 O 9 , formed especially aerobically by the reaction of ADP and an orthophosphate during oxidation, or by the interaction of ADP and phosphocreatine or certain other substrates, and serving as a source of energy for physiological reactions, especially muscle contraction.

Origin:
1940–45

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World English Dictionary
ATP1
 
n
adenosine triphosphate; a nucleotide found in the mitochondria of all plant and animal cells. It is the major source of energy for cellular reactions, this energy being released during its conversion to ADP. Formula: C10H16N5O13P3

ATP2
 
abbreviation for
1.  advanced turboprop
2.  Association of Tennis Professionals
3.  automatic train protection: a safety system which automatically prevents a train from passing through a stop signal

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

ATP
abbreviation of adenosine triphosphate, attested from 1939.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

ATP (ā'tē'pē')
n.
Adenosine triphosphate; an adenosine-derived nucleotide that supplies large amounts of energy to cells for various biochemical processes, including muscle contraction and sugar metabolism, through its hydrolysis to ADP.

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
ATP   (ā'tē'pē')  Pronunciation Key 
Short for adenosine triphosphate. An organic compound, C10H16N5O13P3, that is composed of adenosine and three phosphate groups. It serves as a source of energy for many metabolic processes. ATP releases energy when it is broken down into ADP by hydrolysis during cell metabolism.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
ATP (adenosine triphosphate)

A key energy-carrying molecule in biological systems. It is produced in the body through the process of cell respiration and in plants through photosynthesis.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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American Heritage
Abbreviations & Acronyms
ATP
  1. adenosine triphosphate

  2. Association for Transpersonal Psychology

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences for atp
In this role, atp transports chemical energy within cells for metabolism.
Atp is an unstable molecule in water, since it will hydrolyze into adp and
  phosphate.
Atp has multiple ionizable groups with different acid dissociation constants.
Atp cannot be stored, hence its consumption closely follows its synthesis.
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