subframe

Noun

 * 1) A subsidiary frame chunk of data.
 * 2) A structural component of a vehicle, such as an automobile or aircraft, that uses a discrete, separate structure within a larger body-on-frame or unit body to carry certain components, such as the engine, drivetrain, or suspension.
 * 3)  One of the HTML frames that make up a frameset.
 * 1)  One of the HTML frames that make up a frameset.