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Altruism Noun From  Latin  Alter Fr Al·Tru·Ism  French 

Title Altruism
Text
Merriam-Webster's Collegiate Dictionary
al·tru·ism
 \\ˈal-trü-ˌi-zəm\\
 ETYMOLOGY  French altruisme, from autrui other people, from Old French, oblique case form of autre other, from Latin alter
 DATE  1853
1. unselfish regard for or devotion to the welfare of others
2. behavior by an animal that is not beneficial to or may be harmful to itself but that benefits others of its species
• al·tru·ist  \\-trü-ist\\ noun
• al·tru·is·tic  \\ˌal-trü-ˈis-tik\\ adjective
• al·tru·is·ti·cal·ly  \\-ti-k(ə-)lē\\ adverb
English Etymology
altruism
  1853, "unselfishness, opposite of egoism," from Fr. altruisme, coined or popularized 1830 by Fr. philosopher Auguste Comte (1798-1857), from autrui, from 
O.Fr
http://O.Fr
.
 altrui "of or to others," from L. alteri, dat. of alter "other" (see alter). Apparently suggested to Comte by Fr. legal phrase l'autrui, or in full, le bien, le droit d'autrui. The -l- is perhaps from the L. word.
Oxford Advanced Learner's Dictionary-牛津双解-OALD7
altruism
al·tru·ism 5AltruizEm / noun[U]
   (formal) the fact of caring about the needs and happiness of other people more than your own
   利他主义;利他;无私
 al·tru·is·tic 7Altru5istik / adj.:
   altruistic behaviour 
   利他行为 
Webster's Third New International Dictionary, Unabridged
al·tru·ism
I. \ˈal.trəˌwizəm, -.ˌtrüˌiz-\ noun
(-s)
Etymology: French altruisme, from altrui- (alteration — influenced by Latin alter — of French autrui someone else, from Old French, oblique case form of autre other, another, from Latin alter other) + -isme -ism
: uncalculated consideration of, regard for, or devotion to others' interests sometimes in accordance with an ethical principle
 < Christianity, which is a religion of extreme altruism — R.M.Weaver >
 < the conflict is between selfishness and altruism — Estes Kefauver >
— compare 
egoism
egotism

II. noun
: behavior by an animal that is not beneficial to or may be harmful to itself but that benefits the survival of its species
• altruist noun
• altruistic adjective
• altruistically adverb

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