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.
Contemporary Examples

Despite this, he finished the year 17–0, winning three tournaments and bashing Nadal in the ATP Tour Finals.
Roger Federer: The Transformation of a Tennis Star Sujay Kumar July 7, 2012

The ATP was once a seriously badass union, with a brand of solidarity that would make Marvin Miller proud.
The U.S. Open’s Watergate Allen St. John September 8, 2011

Murray reports that an ATP Tour Manager advised them against taking the court, but seemingly could do no more than that.
The U.S. Open’s Watergate Allen St. John September 8, 2011

ATP Player Council members Gilles Simons and Sergiy Stakhovsky were recently both critical of the equal-pay policy.
ESPN’s ‘Venus Vs.’ Explores Venus Williams’s Equal-Pay Legacy Allison Samuels July 1, 2013

The ATP will threaten to nuke the TP, totally unaware that the TP also possesses nukes set to launch on warning.
8 Nightmares in 2011: U.S. Economy, Olbermann, More Leslie H. Gelb January 22, 2011

Historical Examples

Boys was only a fellow-student, whose acquaintance Erasmus had made ATP 104 Montaigu.
The Age of Erasmus P. S. Allen

It was very amusing to see the attention bestowed upon him ATP.
Wild Nature Won By Kindness Elizabeth Brightwen

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
advanced turboprop
Association of Tennis Professionals
automatic train protection: a safety system which automatically prevents a train from passing through a stop signal

abbreviation of adenosine triphosphate, attested from 1939.

ATP (ā’tē’pē’)
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.
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.
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.
adenosine triphosphate
Association for Transpersonal Psychology


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    adenosine triphosphatase: any of several enzymes that catalyze the hydrolysis of ATP to ADP and phosphate. noun adenosine triphosphatase; an enzyme that converts ATP to ADP ATPase ATP·ase (ā’tē-pē’ās, -āz) n. Adenosine triphosphatase; an enzyme that catalyzes the hydrolysis of ATP. adenosine triphosphatase

  • Atpm

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