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source

1. 
a. a spring that forms the starting point of a stream; headspring
b. the area where the headwaters of a river rise
2. anything, such as a story or work of art, that provides a model or inspiration for a later work
3. Electronics the electrode region in a field-effect transistor from which majority carriers flow into the interelectrode conductivity channel

Source

 

the point of origin of a river.

The source, which may be a lake outlet or a stream receiving its water from a spring, swamp, or glacier, ordinarily corresponds to the place where the permanent channel of the watercourse appears. In a river system having multiple sources, the main source is considered the one farthest from the mouth and largest in volume. It is not unusual for the main channel of a river and its sources to have different names; for instance, the Severnaia Dvina is formed by the confluence of the Sukhona and the lug, the Amur by that of the Shilka and Argun’.

source

[sȯrs]
(electricity)
The circuit or device that supplies signal power or electric energy or charge to a transducer or load circuit.
(electronics)
The terminal in a field-effect transistor from which majority carriers flow into the conducting channel in the semiconductor material.
(mathematics)
The vertex with indegree 0 that is specified in the definition of an s-t network.
(nucleonics)
A radioactive material packaged so as to produce radiation for experimental or industrial use.
(physics)
In general, a device that supplies some extensive entity, such as energy, matter, particles, or electric charge.
A point, line, or area at which mass or energy is added to a system, either instantaneously or continuously.
A point at which lines of force in a vector field originate, such as a point in an electrostatic field where there is positive charge.
(spectroscopy)
The arc or spark that supplies light for a spectroscope.
(thermodynamics)
A device that supplies heat.

source

source

(1) One side of a field effect transistor. See drain.

(2) The point of creation. See source code and source document.

(3) (The Source) An online information service in McLean, VA, launched in 1979 and purchased by CompuServe in 1989. See CompuServe.
References in periodicals archive ?
[sections] 1.863-8(b)(5) so that some portion would be sourced under sections 861 and 862.
The taxability of deferred compensation (e.g., nonqualified stock options and retirement distributions) is another area of scrutiny when determining which income will be sourced to a state.
recognized gain on the disposition of any stock that was sourced under section 865(f) within the five-year period ending on the last day of the taxable year in which the loss was recognized.
If substantially all rights have been transferred, the transaction is a sale and the income is sourced as such.
As explained in the preamble, this rule may permit more than 50 percent of the income to be foreign sourced, based upon the actual export value of the foreign natural resource.
subsidiary to its foreign parent should be characterized and sourced by an analogy to interest.
1.865-1T(a) now provides that loss on personal property other than stock is allocated in the same manner in which gain from the sale of that personal property would be sourced. For example, this now allows a U.S.
865(a), income derived from the sale of personal property is sourced to the seller's residence.