Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of various enzymes that catalyze the transfer of a phosphate group from a donor, such as ADP or ATP, to an acceptor.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of a group of enzymes that transfers phosphate groups from high-energy donor molecules, such as ATP, to specific target molecules (substrates); the process is termed phosphorylation.

from the GNU version of the Collaborative International Dictionary of English

  • n. One of a class of enzymes that catalyze transfer of a phosphate group from ATP to another molecule; it is a type of phosphorylase.

from The Century Dictionary and Cyclopedia

  • n. A ferment-like body which is capable of rendering physiologically active another ferment and thus produces chemical changes in a third body while in itself it is apparently inert.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an enzyme that catalyzes the conversion of a proenzyme to an active enzyme

Etymologies

kin(etic) + -ase.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek κινεῖν (kinein, "to move") + -ase, a suffix forming enzyme names. (Wiktionary)

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