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apsis
(Encyclopedia) CE5 Apsis points, or apsides, in the earth's orbit: At perihelion the earth is closest to the sun and at aphelion it is farthest from the sun. apsis (pl. apsides), point in the…formaldehyde
(Encyclopedia) formaldehydeformaldehydefôrmălˈdəhīdˌ [key], HCHO, the simplest aldehyde. It melts at −92℃, boils at −21℃, and is soluble in water, alcohol, and ether; at STP, it is a flammable,…thallium
(Encyclopedia) thalliumthalliumthălˈēəm [key], metallic chemical element; symbol Tl; at. no. 81; interval in which at. wt. ranges 204.382–204.385; m.p. 303.5℃; b.p. about 1,457℃; sp. gr. 11.85 at 20…aye-aye
(Encyclopedia) aye-ayeaye-ayeīˈīˈ [key], name for an aberrant primate, Daubentonia madagascariensis, related to the lemurs but distinguished by its specialized teeth and fingers. A large nocturnal…Constitution, ship
(Encyclopedia) Constitution, U.S. 44-gun frigate, nicknamed Old Ironsides. It is perhaps the most famous vessel in the history of the U.S. navy. Authorized by Congress in 1794, the ship was launched…iridium
(Encyclopedia) iridiumiridiumĭrĭdˈēəm [key], metallic chemical element; symbol Ir; at. no. 77; at. wt. 192.217; m.p. about 2,410℃; b.p. about 4,130℃; sp. gr. 22.55 at 20℃; valence +3 or +4. Iridium…indium
(Encyclopedia) indiumindiumĭnˈdēəm [key], a metallic chemical element; symbol In; at. no. 49; at. wt. 114.818; m.p. 156.6℃; b.p. about 2,080℃; sp. gr. 7.31 at 20℃; valence +1, +2, or +3. Indium is a…Durrës
(Encyclopedia) DurrësDurrësd&oomacr;rˈəs [key], Ital. Durazzo, city (1989 pop. 82,719), capital of Durrës dist., W Albania, on the Adriatic Sea. The chief seaport of Albania and the leading…scandium
(Encyclopedia) scandiumscandiumskănˈdēəm [key], metallic chemical element; symbol Sc; at. no. 21; at. wt. 44.95591; m.p. 1,541℃; b.p. 2,831℃; sp. gr. 2.99 at 20℃; valence +3. Scandium is a soft…recorder
(Encyclopedia) recorder, musical wind instrument of the flute family, made of wood, varying in length, and having an inverted conical bore (largest end near the mouthpiece). Its tone is produced by…Trending
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