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nest

(Encyclopedia)nest, structure for the reception and incubation of the eggs of birds, reptiles, insects, and some fish or for the parturition of mammals, and also for the care of the young during their period of hel...

fullerene

(Encyclopedia)fullerene, any of a class of carbon molecules in which the carbon atoms are arranged into 12 pentagonal faces and 2 or more hexagonal faces to form a hollow sphere, cylinder, or similar figure. The sm...

Thíra

(Encyclopedia)Thíra or Thera both: thērˈə [key], volcanic island (1991 pop. 9,360), c.30 sq mi (80 sq km), SE Greece, in the Aegean Sea. One of the Cyclades, Thíra is also known as Santorini, for St. Irene, th...

storm

(Encyclopedia)storm, disturbance of the ordinary conditions of the atmosphere attended by wind, rain, snow, sleet, hail, or thunder and lightning. Types of storms include the extratropical cyclone, the common, larg...

Dallas

(Encyclopedia)Dallas, city (2020 pop. 1,304,379), seat of Dallas co., N Tex., on the Trinity River near the junction of its three forks; inc. 1871. The third largest ...

meteor

(Encyclopedia)meteor, appearance of a small particle flying through space that interacts with the earth's upper atmosphere. While still outside the atmosphere, the particle is known as a meteoroid. Countless meteor...

fan

(Encyclopedia)fan, device for agitating air or gases or moving them from one location to another. Mechanical fans with revolving blades are used for ventilation, in manufacturing, in winnowing grain, to remove dust...

pavement

(Encyclopedia)pavement, the wearing surface of a road, street, or sidewalk. Parts of Babylon and Troy are believed to have been paved; Roman roads were noted for their durable stone paving. Cobblestones were common...

star cluster

(Encyclopedia)star cluster, a group of stars near each other in space and resembling each other in certain characteristics that suggest a common origin for the group. Stars in the same cluster move at the same rate...

Sichuan

(Encyclopedia)Sichuan or Szechwan sŭˈchwänˈ [key] [four rivers], province (2010 pop. 80,418,200), c.220,000 sq mi (569,800 sq km), SW China. The capital is Chengdu. A naturally isolated region surrounded by mou...