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palladium, chemical element

(Encyclopedia) palladium [Gr. Pallas, goddess of wisdom], metallic chemical element; symbol Pd; at. no. 46; at. wt. 106.42; m.p. 1,554℃; b.p. 2,970℃; sp. gr. 12.02 at 20℃; valence +2, +3, or +4.…

hydrogen peroxide

(Encyclopedia) hydrogen peroxide, chemical compound, H2O2, a colorless, syrupy liquid that is a strong oxidizing agent and, in water solution, a weak acid. It is miscible with cold water and is…

Beth-shan

(Encyclopedia) Beth-shanBeth-shanbĕth-shănˈ [key] or Beth-sheanBeth-sheanbĕth-shēˈən [key], ancient town, at the meeting of the Vale of Jezreel with the Jordan valley. It was the most strategic point…

nitrous oxide

(Encyclopedia) nitrous oxide or nitrogen (I) oxide, chemical compound, N2O, a colorless gas with a sweetish taste and odor. Its density is 1.977 grams per liter at STP. It is soluble in water,…

sodium bicarbonate

(Encyclopedia) sodium bicarbonate or sodium hydrogen carbonate, chemical compound, NaHCO3, a white crystalline or granular powder, commonly known as bicarbonate of soda or baking soda. It is soluble…

‘Oumuamua

(Encyclopedia) ‘Oumuamua‘Oumuamuaōm&oomacr;ˈəm&oomacr;ˈə [key], officially 1I/2017 U1 (‘Oumuamua), interstellar object, the first to be discovered in the solar system. Highly variable in…

snuff

(Encyclopedia) snuff, preparation of pulverized tobacco used by sniffing it into the nostrils, chewing it, or placing it between the gums and the cheek. The blended tobacco from which it is made is…

Clydesdale horse

(Encyclopedia) Clydesdale horse, breed of draft horse developed in Scotland. It closely resembles the Shire horse, although it is not as heavy. The Clydesdale is characterized by its graceful,…

Ctesiphon

(Encyclopedia) CtesiphonCtesiphontĕsˈĭfŏnˌ, tēˈsĭ– [key], ruined ancient city, 20 mi (32 km) SE of Baghdad, Iraq, on the left bank of the Tigris opposite Seleucia and at the mouth of the Diyala River…

Gilead

(Encyclopedia) GileadGileadgĭlˈēăd [key], in the Bible. 1 Eponym of the Gileadites, grandson of Manasseh. 2 Gadite. 3 Jephthah's father. 4 City near Mizpah, denounced by Hosea. 5 Fertile, mountainous…