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atom [atom 词源字典]: atom: [16] Etymologically, atom means ‘not cut, indivisible’. Greek átomos ‘that which cannot be divided up any further’ was formed from the negative prefix a- ‘not’ and the base *tom- ‘cut’ (source also of English anatomy and tome), and was applied in the Middle Ages not just to the smallest imaginable particle of matter, but also to the smallest imaginable division of time; an hour contained 22,560 atoms.

Its use by classical writers on physics and philosophy, such as Democritus and Epicurus, was sustained by medieval philosophers, and the word was ready and waiting for 19th-century chemists when they came to describe and name the smallest unit of an element, composed of a nucleus surrounded by electrons.
=> anatomy, tome[atom etymology, atom origin, 英语词源]
epicure: epicure: [16] The Greek philosopher Epicurus (Greek Epíkouros) (341–270 BC) evolved a code of life and behaviour which stressed the avoidance of pain, but since his time it has been stood on its head to signify the active seeking of pleasure – and particularly the pleasures of the table. Indeed, when the word epicure (which arrived via Latin epicūrus) was introduced into English it was even used for a ‘glutton’ – since toned down somewhat to ‘connoisseur of fine food and wine’.
academy (n.): late 15c., "the classical Academy," from French Académie, from Latin Academia, from Greek Akademeia "grove of Akademos," a legendary Athenian of the Trojan War tales (his name apparently means "of a silent district"), whose estate, six stadia from Athens, was the enclosure where Plato taught his school.
The A[cademy], the Garden, the Lyceum, the Porch, the Tub, are names used for the five chief schools of Greek philosophy, their founders, adherents, & doctrines: the A., Plato, the Platonists & Platonism; the Garden, Epicurus, the Epicureans, & Epicureanism; the Lyceum, Aristotle, the Aristotelians, & Aristotelianism; the Porch, Zeno, the Stoics, & Stoicism; the Tub, Antisthenes, the Cynics, & Cynicism. [Fowler]
Sense broadened 16c. into "any school or training place." Academy awards (1941) so called for their distributor, the Academy of Motion Picture Arts and Sciences.
epicure (n.): late 14c., "follower of Epicurus," from Latinized form of Greek Epicouros (341-270 B.C.E.), Athenian philosopher who taught that pleasure is the highest good and identified virtue as the greatest pleasure; the first lesson recalled, the second forgotten, and the name used pejoratively for "one who gives himself up to sensual pleasure" (1560s), especially "glutton, sybarite" (1774). Epicurus's school was opposed by the stoics, who first gave his name a reproachful sense. Non-pejorative meaning "one who cultivates refined taste in food and drink" is from 1580s.
epicurean (n.): late 14c., "follower of the philosophical system of Epicurus," from Old French Epicurien, or from epicure + -ian. From 1570s as "one devoted to pleasure." As an adjective, attested from 1580s in the philosophical sense and 1640s with the meaning "pleasure-loving."
epicureanism (n.): 1751, with reference to the philosophical system of Epicurus; 1847 in a general sense "attachment to or indulgence in luxurious habits," from epicurean + -ism. Earlier was epicurism (1570s).