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Empedocles

(Encyclopedia)Empedocles ĕmpĕdˈəklēz [key], c.495–c.435 b.c., Greek philosopher, b. Acragas (present Agrigento), Sicily. Leader of the democratic faction in his native city, he was offered the crown, which h...

earth, in chemistry

(Encyclopedia)earth, in chemistry, metallic oxide not readily reducible by chemical means, e.g., alkaline earths, rare earths, and alumina. The name is also applied to certain absorbent clays, e.g., fuller's earth,...

stoa

(Encyclopedia)stoa stōˈə [key], in ancient Greek architecture, an extended, roofed colonnade on a street or square. Early examples consisted of a simple open-fronted shed or porch with a roof sloping from the ba...

Brutus, in ancient Rome

(Encyclopedia)Brutus bro͞oˈtəs [key], in ancient Rome, a surname of the Junian gens. Lucius Junius Brutus, fl. 510 b.c., was the founder of the Roman republic. He feigned idiocy to escape death at the hands of L...

W and Z particles

(Encyclopedia)W and Z particles, elementary particles that mediate, or carry, the fundamental force associated with weak interactions. The discovery of the W and Z particles at CERN near Geneva, Switzerland, in the...

Quintilian

(Encyclopedia)Quintilian (Marcus Fabius Quintilianus) kwĭntĭlˈyən [key], c.a.d. 35–c.a.d. 95, Roman rhetorician, b. Calagurris (now Calahorra), Spain. He taught rhetoric at Rome (Pliny the Younger and possibl...

Justin Martyr, Saint

(Encyclopedia)Justin Martyr, Saint, c.a.d. 100–c.a.d. 165, Christian apologist, called also Justin the Philosopher. Born in Samaria of pagan parents, he studied philosophy, and after his conversion in Ephesus to ...

Cassius

(Encyclopedia)Cassius kăshˈəs [key], ancient Roman family. There were a number of well-known members. Spurius Cassius Viscellinus, d. c.485 b.c., seems to have been consul several times. In 493 b.c. he negotiate...

Philo

(Encyclopedia)Philo jo͞odēˈəs [key] [Lat.,=Philo the Jew], c.20 b.c.–c.a.d. 50, Alexandrian Jewish philosopher. His writings have had an enormous influence on both Jewish and Christian thought, and particular...

Telesio, Bernardino

(Encyclopedia)Telesio, Bernardino bĕrnärdēˈnō tālāˈzyō [key], 1509–88, Italian philosopher, one of the leaders in the attack on that part of Aristotelian philosophy that had furnished the foundation for ...