A letter of the Greek alphabet.
Symbol for Amplification Factor.
Mud Drum
A water drum, particularly one mounted low on the boiler whose function is primarily to trap mud from circulation.
A listening term, a sound that is poorly defined, sloppy or vague. For example, a "muddy" bass is often boomy with all the notes tending to run together.
A small manhole, too small for access but used for washing out the boiler, either as an inlet for a water hose or as a drain to remove mud.
An acoustic filter element used to reduce sound pressure levels inside a duct.
Multi Element Array
An array that consists of one or more arrays and is classified as to directivity.
Multi Element Parasitic Array
An array that contains two or more parasitic elements and a driven element.
Multi Mode Fibre
Optical fibre supporting more than one propagating mode.
Multi Unit Tube
An electron tube containing two or more units within the same envelope.
More than one conductor, as in a cable.
Couplers that patch receivers or transmitters to antennas.
Also known as Polycrystalline.
Multiloop Servosystem
A servosystem that contains more than one servo loop.
Electronic meter that displays voltage, current and resistance.
Multimodal Distribution
A distribution with more than one mode.
An algebraic expression consisting of 2 or more terms.
The integer b is a multiple of the integer a if there is an integer d such that b=da.
Multiple Bond
Sharing of more than one electron pair between bonded atoms.
Multiple Disc Clutch
Multiple plates on input and output shafts are brought together to transmit torque. The multiple plates increases the frictional area.
Multiple Thread Screw
A screw made of two or more threads to provide an increased lead with a specified pitch.
The product of multiplying a number by a whole number. The multiples of 3 are 6, 9, 12, 15,
A mechanical or electrical device for time sharing or a circuit.
A method for simultaneous transmission of two or more signals over a common carrier wave.
In the equation x = mn, m and n are the multiplicands since they are the two objects being multiplied together.
In arithmetic, multiplication of one number, a, by another, b, consists of adding a to itself b times.
Multiplication Factor
The number of times something is multiplied.
Multiplication Rule
The probability that events A and B both occur, is equal to the conditional probability that A occurs given that B occurs, times the unconditional probability that B occurs.
Multiplicative Identity
The number 1 is the multiplicative identity.
Multiplicative Inverse
The number that when multiplied by the original number will result in a product of one.
A building block in which the output is either High or Low. There are three foms of multivibrator: Monostable, bi-stable and astable. The monostable has only one stable state, the bi-stable has two stable states and the astable is free-running (no stable states).
An alloy of high magnetic permeability containing up to 78% nickel with iron, copper and manganese.
Muntz Metal
Stonger than normal brass and used for castings and hot worked items. 60 % Copper 40 % Zinc

A type of lepton; often called a heavy electron.
Muon Chamber
The outer layers of a particle detector capable of registering tracks of charged particles.
Murdock, William
Built first steam powered lorry in 1784 and invented gas lighting.
Muriatic Acid
Ancient name for Hydrochloric Acid.
Music Wire
Another name for piano wire, a high quality steel wire used for making springs.
Musical Twelfth
The third-harmonic of a tone, which equals one octave and a fifth. Hence, twelfth and not 13 because you don′t count the original tone.
Mustard Gas
Common name for Dichlorodiethyl Sulphide a gas used in warfare.
Mutual Conductance
The ratio of the current at the output port and the voltage at the input ports.
Mutual Flux
The total flux in the core of a transformer that is common to both the primary and secondary windings.
Mutual Inductance
A circuit property existing when the relative position of two inductors causes the magnetic lines of force from one to link with the turns of the other.
Mutual Interference
The condition resulting when electronic systems degrade each other on a reciprocal basis.