A new addition.
A product to be used with a previous product.
That which is expanded; expanse; extended surface.
The operation of steam in a cylinder after its communication with the boiler has been cut off, by which it continues to exert pressure upon the moving piston.
The replacement of a short name (e.g., acronym, initialism, alphanumeric symbol, abbreviation) with the longer name that is synonymous with it, as when spelling out acronyms to ensure clarity for a general audience.
The string of text thus substituted.
An act, process, or instance of expanding.
The fractional change in unit length per unit length per unit temperature change.