injection

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The act of injecting.
• noun Something that is injected, especially a dose of liquid medicine injected into the body.
• noun Mathematics A function that is one-to-one.

from The Century Dictionary.

• noun In geology, the penetration of a rock by a molten magma.
• noun The act of injecting or throwing in; the act of forcing in, as a fluid into a passage, cavity, or substance of loose texture: as, the injection of a drug by means of a syringe; the injection of cold water into a steam-condenser to produce a vacuum.
• noun In anatomy, the act of injecting a body for dissection; the process of filling the vessels or other cavities of a body, or some part of a body, with a preservative, coloring, or other fluid.
• noun Specifically, in medicine, the giving of an enema; also, the enema given.
• noun That which is injected, as a fluid; specifically, any substance or preparation forced into an animal body to preserve it, display it, or otherwise fit it for dissection or other examination.
• noun The state of being hyperemic or bloodshot: as, the injection of the conjunctiva of an inflamed eye.
• noun Figuratively, a throwing in, as of a remark, hint, or suggestion; an injected saying or influence.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act of injecting or throwing in; -- applied particularly to the forcible insertion of a liquid or gas, by means of a syringe, pump, etc.
• noun That which is injected; especially, a liquid inserted thrown into a cavity of the body by a syringe or pipe; a clyster; an enema.
• noun The act or process of filling vessels, cavities, or tissues with a fluid or other substance.
• noun A specimen prepared by injection.
• noun The act of throwing cold water into a condenser to produce a vacuum.
• noun The cold water thrown into a condenser.
• noun (Steam Eng.) the cock or valve through which cold water is admitted into a condenser.
• noun See under Condenser.
• noun the pipe through which cold water is through into the condenser of a steam engine.
• noun a method of inserting fuel into internal-combustion engines by directly forcing the liquid fuel into the combustion chamber at an appropriate point in the piston cycle; in contrast to carburetion, in which an air-fuel mixture is drawn in by the downward stroke of the piston.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The act of injecting, or something that is injected.
• noun specifically, medicine Something injected subcutaneously, intravenously, or intramuscularly by use of a syringe and a needle.
• noun set theory A function that maps distinct x in the domain to distinct y in the codomain; formally, a f: X → Y such that f(a) = f(b) implies a = b for any a, b in the domain.
• noun mathematics A relation on sets (X,Y) that associates each element of Y with at most one element of X.
• noun figuratively The addition of money to someone, or to a business.
• noun programming The insertion of program code into an application, URL, hardware, etc.
• noun A specimen prepared by injection.
• noun The act of throwing cold water into a condenser to produce a vacuum.
• noun The cold water thrown into a condenser to produce a vacuum.

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

• noun the act of putting a liquid into the body by means of a syringe
• noun any solution that is injected (as into the skin)
• noun the forceful insertion of a substance under pressure