injection

Definition from Wiktionary, a free dictionary

Wikipedia

Contents 1 English 1.1 Noun 1.1.1 Related terms 1.1.2 Translations 1.2 See also 2 French 2.1 Noun

[edit] English

[edit] Noun

injection (plural injections)

1. The act of injecting, or something that is injected.
2. (specifically, medicine) Something injected subcutaneously, intravenously, or intramuscularly by use of a syringe and a needle.
3. (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. (mathematics) A relation on sets (X,Y) that associates each element of Y with at most one element of X.

[edit] Related terms

• inject
• injective

[edit] Translations

[edit] See also

• bijection (2)
• surjection (2)
• jab
• hypodermic
• immunization

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[edit] French

[edit] Noun

injection f. (plural injections)

1. injection