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Doyle, Richard

(Encyclopedia)Doyle, Richard, 1824–83, English caricaturist, water colorist, and illustrator. He was the son and pupil of John Doyle, a popular caricaturist. His Journal (British Mus.), a book of sketches done at...

Conchos

(Encyclopedia)Conchos kōnˈchōs [key], river, c.350 mi (560 km) long, rising in S Chihuahua state, N Mexico, and flowing N and NE to the Rio Grande. Dams along its middle course provide water for extensive cotton...

Ctesibius

(Encyclopedia)Ctesibius tĭsĭbˈēəs [key], fl. 2d cent. b.c., Alexandrian Greek inventor. He reputedly was the first to discover and apply the expansive power of air as a motive force. Among the inventions ascri...

Neptune, in Roman religion and mythology

(Encyclopedia)Neptune, in Roman religion and mythology, god of water. He was presumably an indigenous god of fertility, but in later times he was identified with the Greek Poseidon, god of the sea. At his festival,...

Wachusett Reservoir

(Encyclopedia)Wachusett Reservoir wôcho͞oˈsĭt [key], on the South Branch of the Nashua River, central Mass., NE of Worcester; built 1897–1905. Impounded by Wachusett Dam (completed 1906), it receives some of ...

varve

(Encyclopedia)varve, in geology, pair of thin sedimentary layers formed annually by seasonal climatic changes. Usually found in glacial lake deposits, varves consist of a coarse-grained, light-colored summer deposi...

Adullam

(Encyclopedia)Adullam ədŭlˈəm [key], in the Bible, border town of Judah, SW of Jerusalem. David hid in the Cave of Adullam when he fled from Saul. From here three of his men went to get him water from the well ...

sea star

(Encyclopedia)sea star, also called starfish, echinoderm of the class Asteroidae, common in tide pools. Sea stars vary in size from under 1⁄2 in. (1.3 cm) to over 3 ft (90 cm) in diameter. They are commonly dull ...

tunicate

(Encyclopedia)tunicate to͞oˈnəkĭt [key], marine animal of the phylum Chordata, which also includes the vertebrates. The adult form of most tunicates (also called urochordates) shows no resemblance to vertebrate...

carbon dioxide

(Encyclopedia)carbon dioxide, chemical compound, CO2, a colorless, odorless, tasteless gas that is about one and one-half times as dense as air under ordinary conditions of temperature and pressure. It does not bur...