(grammar) An established expression whose wording is subject to little or no variation, and which may or may not be idiomatic. / (grammar) An idiomatic expression in general.

(electronics) An early radio receiver, having no electrical power supply except the radio waves themselves; it used a crystal of lead or cadmium sulphide and a wire (the cat's whisker) touching the crystal's surface.

A screw with threads along the entire length and no head. Typically, set screws have a hex or slot drive recessed in the threaded length; a grub screw or worm screw.

(computing) A file of related records on a computer-readable medium such as disk, especially one on a mainframe computer; a dataset.

To select (something or someone) for a specific purpose. / To distinguish, make obvious the distinction between (two things) or of (something).

(transitive) To ready for use. / (transitive) To arrange logically. / (transitive) To cause to happen. / (transitive) To trap or ensnare. / (transitive) To arrange for an outcome; to tamper or rig.

In a position to function; ready.

(transitive) To delay or obstruct. / (transitive) To remove from or allow distance. / (transitive) To install or position behind a boundary or surface, or in a recess.

(mathematics) the set of complex numbers c for which the orbit of 0 under iteration of the complex quadratic polynomial zₙ₊₁ = zₙ² + c remains bounded. The boundary of this set is a fractal.

Alternative form of television set