injection

American Heritage® Dictionary of the English Language, Fourth Edition

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

Century Dictionary and Cyclopedia

1. n. 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.
2. n. 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.
3. n. Specifically, in medicine, the giving of an enema; also, the enema given.
4. n. 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. There are many kinds of injections, all reducible to three categories: Preservative injections, which retard or arrest decomposition, thus keeping a subject, or any part of one, fit for dissection. Arsenic is the usual basis of such injections.
5. n. The state of being hyperemic or bloodshot: as, the injection of the conjunctiva of an inflamed eye.
6. n. Figuratively, a throwing in, as of a remark, hint, or suggestion; an injected saying or influence.
7. n. In geology, the penetration of a rock by a molten magma.

Wiktionary

1. n. The act of injecting, or something that is injected.
2. n. specifically, medicine Something injected subcutaneously, intravenously, or intramuscularly by use of a syringe and a needle.
3. n. 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.
4. n. mathematics A relation on sets (X,Y) that associates each element of Y with at most one element of X.
5. n. figuratively The addition of money to someone, or to a business.
6. n. programming The insertion of program code into an application, URL, hardware, etc.
7. n. A specimen prepared by injection.
8. n. The act of throwing cold water into a condenser to produce a vacuum.
9. n. The cold water thrown into a condenser to produce a vacuum.

GNU Webster's 1913

1. n. 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.
2. n. That which is injected; especially, a liquid inserted thrown into a cavity of the body by a syringe or pipe; a clyster; an enema.
3. n. The act or process of filling vessels, cavities, or tissues with a fluid or other substance.
4. n. A specimen prepared by injection.
5. n. The act of throwing cold water into a condenser to produce a vacuum.
6. n. The cold water thrown into a condenser.

WordNet 3.0

1. n. the act of putting a liquid into the body by means of a syringe
2. n. any solution that is injected (as into the skin)
3. n. the forceful insertion of a substance under pressure