CMRR  the ratio of the gain of an amplifier for difference signals between the input terminals, to the gain for the average or commonmode signal component.
Related Terms 
ADJUSTABLE DIFFERENTIAL
A means of changing the difference between the control cutin and cutout points.

HIGH WATER INEQUALITY
The difference between the heights of the two high waters during a tidal day

GRID MAGNETIC ANGLE
Angular difference in direction between grid north and magnetic north. It is measured east or west from grid north. Grid magnetic angle is sometimes called GRID VARIATION or GRIVATION.

HELIOCENTRIC PARALLAX
The difference in the apparent direction or positions of a celestial body outside the solar system, as observed from the earth and sun. Also called STELLAR PARALLAX, ANNUAL PARALLAX

HARMONIC
1. A sinusoidal quantity having a frequency that is an integral multiple of the frequency of a periodic quantity to which it is related. 2. A signal having a frequency which is an integral multiple of the fundamental frequency.

DIFFERENTIAL PRESSURE INDICATOR
An indicator which signals the difference in pressure between any two points of a system or a component.

FILTRATION (BETA) RATIO
The ratio of the number of particles greater than a given size in the influent fluid to the number of particles greater than the same size in the effluent fluid.

ADIABATIC EFFICIENCY
The ratio of actual work output of a heat engine to the ideal output.

SHEAR RATE
The difference between the velocities along the parallel faces of a fluid element divided by the distance between the faces.

BETARATIO (ßRATIO)
The ratio of the number of particles greater than a given size in the influent fluid to the number of particles greater than the same size in the effluent fluid, under specified test conditions (see 'MultiPass Test').
