noun: (typography, rare) A factotum letter, or a similar kind of ornamentally bordered letter formerly used at the start of a chapter or section of a book.
noun: (colloquial) A faculty within a university.
noun: (military, aviation) Initialism of Forward Air Control.
noun: Initialism of flow-accelerated corrosion.
noun: Initialism of flow-assisted corrosion.
noun: Initialism of Fellow of the Atlantic Council.