1. A hard black form of lignite that takes a brilliant polish and is used in jewellery or ornamentation.
2. An airplane powered by one or more jet engines; SYN. jet plane, jet-propelled plane.
3. The occurrence of a sudden discharge (as of liquid); SYN. squirt, spurt, spirt.
Hard, black variety of lignite, a type of coal. It is cut and polished for use in jewelry and ornaments. Articles made of jet have been found in Bronze Age tombs
ETYM From spick,or spike; cf. Irish and Gael. spiocaid a spigot, Irish spice a spike. Related to Spike.
Bung; plug of a tap; end of smaller pipe when inserted into larger one to form a junction.
1. A light touch or stroke; SYN. pat, dab.
2. A plug for a bunghole in a cask; SYN. spigot.
3. A small metal plate that attaches to the toe or heel of a shoe (as in tap dancing).
4. A tool for cutting female (internal) screw threads.
ETYM Latin valva the leaf, fold, or valve of a door: cf. French valve.
1. A structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it.
2. Any mechanical device for controlling the flow of a fluid.
3. Device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone.