Origin of intro-Classical Latin intro- from intro, inwardly, on the inside from an unverified form intero, akin to inter: see inter-
nounpl. in·tros Informal
- In; into: introjection.
- Inward: introvert.
Origin of intro-Latin intrō- from intrō to the inside ; see en in Indo-European roots.
(third-person singular simple present intros, present participle introing, simple past and past participle introed)
- (informal) To introduce.
Abbreviated from introduction, from Latin, ultimately a compound from intrō (“I enter”) – the abbreviation removes the second part of the compound, ultimately from Proto-Indo-European *h₁énteros (“inner, what is inside”). The demoscene sense comes from the fact that they were originally prepended to pirated copies of computer games.
- (law) Abbreviation of introduction.
This is the customary abbreviation of this term as used in legal citation. See, e.g., The Bluebook: A Uniform System of Citation, Nineteenth Edition (2010), "Subdivisions", Table T16, p. 472-73.