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sebaceous gland
(Encyclopedia) sebaceous glandsebaceous glandsəbāˈshəs [key], gland in the skin of mammals that secretes an oily substance called sebum. In humans, sebaceous glands are primarily found in association…Tabernacle
(Encyclopedia) TabernacleTabernacletăbˈərnăkˌəl [key], in the Bible, the portable holy place of the Hebrews during their desert wanderings. It was a tent, like the portable tent-shrines used by…Alexander Archipelago
(Encyclopedia) Alexander ArchipelagoAlexander Archipelagoärkĭpĕlˈəgō [key], island group off SE Alaska. The islands are the exposed tops of the submerged coastal mountains that rise steeply from the…ignition
(Encyclopedia) CE5 Ignition system ignition, apparatus for igniting a combustible mixture. The German engineer Nikolaus A. Otto, in his first gas engine, used flame ignition; another method was…Stirling engine
(Encyclopedia) Stirling engine, an external combustion reciprocating engine having an enclosed working fluid that is alternately compressed and expanded to operate a piston, thus converting heat from…Land, Edwin Herbert
(Encyclopedia) Land, Edwin Herbert, 1909–91, American inventor and photographic pioneer. While at Harvard, Land became interested in the properties and manipulation of polarized light. He left…paper nautilus
(Encyclopedia) paper nautilus or argonaut, pelagic, surface-dwelling cephalopod mollusk of the genus Argonauta. Like the closely related octopus, the paper nautilus has a rounded body, eight…Cobden, Richard
(Encyclopedia) Cobden, RichardCobden, Richardkŏbˈdən [key], 1804–65, British politician, a leading spokesman for the Manchester school. He made a fortune as a calico printer in Manchester. A firm…tsetse fly
(Encyclopedia) tsetse flytsetse flytsĕtˈsē [key], name for any of several bloodsucking African flies of the genus Glossina, and in the same family as the housefly. The larva of the tsetse fly…plasma
(Encyclopedia) plasma, in physics, fully ionized gas of low density, containing approximately equal numbers of positive and negative ions (see electron and ion). It is electrically conductive and is…Trending
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