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Aeneas	the Trojan hero of the Aeneid, who survives the fall of Troy, wanders for seven years, and becomes the founder of Rome.
alkaline	of soil, having a pH above seven. [1/2 definitions]
American Samoa	an unincorporated U.S. territory consisting of seven South Pacific islands north of Tonga. (Cf. Samoa, Western Samoa.)
bald eagle	a large eagle of the United States and Canada that has a white head and tail and a wingspan of about seven feet.
barium	a chemical element of the alkaline-earth group that has fifty-seven protons in each nucleus and that is usu. found in compounds such as salts. (symbol: Ba) [1/2 definitions]
berkelium	a radioactive synthetic metal element of the actinide series that has ninety-seven protons in each nucleus. (symbol: Bk)
Big Dipper	part of the constellation Ursa Major, made up of its seven brightest stars and forming the shape of a ladle, or dipper.
calypso	(cap.) in The Odyssey by Homer, a sea nymph who detained Odysseus for seven years. [1/3 definitions]
canonical hour	any of seven periods of the day, such as vespers, set apart for the recitation of certain prayers, psalms, or the like in many Christian churches; divine office. [1/2 definitions]
Central America	an extension of the North American continent from the Mexican border to South America, comprising seven countries.
chukker	in polo, a period of play lasting seven and one-half minutes.
cobalt	a chemical element that has twenty-seven protons in each nucleus and occurs as a brittle silver-white solid metal, used in a variety of alloys to increase hardness. (symbol: Co)
colossus	(cap.) the bronze statue of Helios at Rhodes, one of the seven wonders of the ancient world. [1/3 definitions]
compline	the last of the seven canonical hours in Christian worship, or the accompanying service.
craps	(used with a sing. or pl. verb) a game of dice in which a seven or eleven on the first throw wins, a two, three, or twelve loses, and any other first throw may win if it can be repeated before a seven.
deadly sins	the seven sins believed to cause spiritual death: pride, covetousness, lust, anger, gluttony, envy, and sloth.
decimal fraction	a fraction whose denominator is some power of ten, indicated by a decimal point before the numerator, such as .7, equaling seven tenths, or .015, equaling fifteen thousandths. (Cf. common fraction.)
duodecimo	the page size of a book that is five by seven and a half inches or one twelfth of a printer's sheet. [1/3 definitions]
eight	the number that follows seven and precedes nine in the sequence of cardinal numbers. [1/3 definitions]
El Niño	an unusually warm Pacific Ocean current that develops near the International Date Line in the center of the ocean and flows east toward Peru and then south along the coast of South America. El Niño events, which occur every two to seven years approximately, are associated with various negative impacts including damage to the livelihoods of those dependent on fishing and disturbance to regional and global weather patterns, which in turn can increase the incidence of disease and the frequency of destructive weather events.
EU	abbreviation of "European Union," an economic and political union of twenty-seven democratic countries formed from the European Economic Community in 1993. The union currently consists of the member states Austria, Belgium, Bulgaria, the Czech Republic, Cyprus, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, and the United Kingdom.

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