The rear, back, or unseen portion (of something).
The processing of spent fuel from a nuclear reactor into reusable materials.
That part of a hardware or software system that is farthest from the user; the internals rather than the user interface.
The latter end of any given time, especially the latter part of the year; autumn; late autumn.
Money paid on a contingent deferred basis, for example, as a proportion of the profits or revenue of a work.
A short joist between a header and a wall.
An appendage or appendix.
An element, often triangular, to which the strings of a violin, guitar, etc. are attached at the lower end of an instrument.
The part of a telescope containing the adjusting device for the eyepiece, etc.
The part of a lock that transmits motion from the hub to the latch bolt.