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Autolycus, Greek astronomer and mathematician

(Encyclopedia)Autolycus ôtŏlˈĭkəs [key], fl. 4th cent. b.c., astronomer and mathematician of Pitane in Aeolis. Of his two extant works, that on the revolving sphere is said to be the oldest completely preserve...

Neptune, in astronomy

(Encyclopedia)Neptune, in astronomy, 8th planet from the sun at a mean distance of about 2.8 billion mi (4.5 billion km) with an orbit lying between those of Uranus and the dwarf planet Pluto; its period of revolut...

abacus, in architecture

(Encyclopedia)abacus ăbˈəkəs [key], in architecture, flat slab forming the top member of a capital. In classical orders it varies from a square form having unmolded sides in the Greek Doric, to thinner proporti...

Thetis

(Encyclopedia)Thetis thēˈtĭs [key], in Greek mythology, a nereid, mother of Achilles. She was loved by both Zeus and Poseidon, but because of a prophecy that her son would be greater than his father, the gods ga...

in vitro fertilization

(Encyclopedia)in vitro fertilization vēˈtrō, vĭˈtrō [key] (IVF), technique for conception of a human embryo outside the mother's body. Several ova, or eggs, are removed from the mother's body and placed in sp...

Aratus, Greek statesman and general

(Encyclopedia)Aratus, d. 213 b.c., Greek statesman and general of Sicyon, prime mover and principal leader of the Second Achaean League. His objective at first was to free the Peloponnesus from Macedonian dominatio...

Fates

(Encyclopedia)Fates, in Greek religion and mythology, three goddesses who controlled human lives; also called the Moerae or Moirai. They were: Clotho, who spun the web of life; Lachesis, who measured its length; an...

Odysseus

(Encyclopedia)Odysseus yo͞olĭsˈēz [key], in Greek mythology, son and successor of King Laertes of Ithaca. A leader of Greek forces during the Trojan War, Odysseus was noted (as in the Iliad) for his cunning str...

Papandreou, George, 1888–1968, Greek political leader

(Encyclopedia)Papandreou, George päˌpəndrāˈo͞o [key], 1888–1968, Greek political leader, father of Andreas Papandreou and grandfather of George Papandreou (b. 1952). As a young man he became involved in ant...

Papandreou, George, 1952–, Greek political leader

(Encyclopedia)Papandreou, George (Georgios Andreou Papandreou) päˌpəndrāˈo͞o [key], 1952–, Greek political leader, b. Minnesota. The son of Andreas Papandreou and grandson of George Papandreou (1888–1968)...