| jet | <chemical> A variety of lignite, of a very compact texture and velvet black colour, susceptible of a good polish, and often wrought into mourning jewelry, toys, buttons, etc. Formerly called also black amber. <zoology> Jet ant, a blackish European ant (Formica fuliginosa), which builds its nest of a paperlike material in the trunks of trees. Origin: OF. Jet, jayet, F. Jaiet, jais, L. Gagates, fr. Gr.; so called from or, a town and river in Lycia Alternative forms: jeat, jayet. Source: Websters Dictionary (01 Mar 1998) |
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| jet ejector pump | A suction pump in which fluid under high pressure is forced through a nozzle into an abruptly larger tube where a high velocity jet, at a low pressure in accordance with Bernoulli's law, entrains gas or liquid from a side tube opening just beyond the end of the nozzle to create suction; e.g., the pump by which steam is used to evacuate an autoclave, a water aspirator. (05 Mar 2000) |
| jet injection | Hypodermic injection of drugs by a jet injector. (05 Mar 2000) |
| jet injector | An injector that uses high pressure to force a liquid through a small orifice at a velocity sufficient to penetrate skin or mucous membrane without the use of a needle. (05 Mar 2000) |
| jet lag | An imbalance of the normal circadian rhythm resulting from subsonic or supersonic travel through a varied number of time zones and leading to fatigue, irritability, and various functional disturbances. (05 Mar 2000) |
| jet nebuliser | An atomiser that uses an air or gas stream to change a liquid into small particles. (05 Mar 2000) |
| jeterus | <botany> A yellowness of the parts of plants which are normally green; yellows. Source: Websters Dictionary (01 Mar 1998) |
| jetty | Origin: F.jetee a pier, a jetty, a causeway. See Jet a shooting forth, and cf. Jutty. 1. A part of a building that jets or projects beyond the rest, and overhangs the wall below. 2. A wharf or pier extending from the shore. 3. <physics> A structure of wood or stone extended into the sea to influence the current or tide, or to protect a harbor; a mole; as, the Eads system of jetties at the mouth of the Mississippi River. Jetty ad, a projecting part at the end of a wharf; the front of a wharf whose side forms one of the cheeks of a dock. Source: Websters Dictionary (01 Mar 1998) |
| high-frequency jet ventilation | Respiratory support system used primarily with rates of about 100 to 200/min with volumes of from about one to three times predicted anatomic dead space. Used to treat respiratory failure and maintain ventilation under severe circumstances. (12 Dec 1998) |
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| injections, jet | The injection of solutions into the skin by compressed air devices so that only the solution pierces the skin. (12 Dec 1998) |