1. <cardiology> An object or substance that influences the rate at which a certain phenomenon occurs, often used alone to indicate the natural cardiac pacemaker or an artificial cardiac pacemaker.

2. <biochemistry> A substance whose rate of reaction sets the pace for a series of interrelated reactions.

(24 Mar 1998)

Pacchioni, Antonio, PACE, pace, pacefollower < Prev | Next > pacemaker, artificial, pacemaker failure

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