1. A heavy copper ring placed on the core of a relay to delay operation of the relay.

2. A movable iron core for a coil.

3. A movable piece of metal or dielectric material used in a wave guide for tuning or impedance-matching purposes.

A strip of metal used to space between lines of type.

Any of a number of pulmonate gastropods which have a rudimentary shell and the body elevated toward the middle and front end where the mantle covers the lung region.

A unit of mass in the British gravitational system of units, equal to the mass which experiences an acceleration of 1 foot per second per second when a force of 1 pound acts on it; equal to approximately 32.1740 pound mass or 14.5939 kilograms. Also known as geepound.

1. A small, roughly shaped piece of metal for subsequent processing, as by forging or extruding.

2. The piece of material produced by piercing a hole in a sheet.

To inject a borehole with cement, slurry, or various liquids containing shredded materials in an attempt to restore lost circulation by sealing off the openings in the borehole-wall rocks.

A short fuel rod inserted in a hole or channel in the active lattice of a nuclear reactor.

1. As pertains to shaped charge ammunition, massive and relatively slow-moving remnant of the collapsed metal liner, as distinguished from the jet.

2. A solid cast iron projectile used in test firing.