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disjunction

[dis-juhngk-shuhn]

noun

the act of disjoining or the state of being disjoined: a disjunction between thought and action.

Logic.

Also called disjunctive, inclusive disjunction. a compound proposition that is true if and only if at least one of a number of alternatives is true.

Also called exclusive disjunction. a compound proposition that is true if and only if one and only one of a number of alternatives is true.

the relation among the components of such a proposition, usually expressed by AND or V.

Origin:
1350–1400; Middle English disjunccioun < Latin disjunctiōn- (stem of disjunctiō) separation, equivalent to disjunct(us) (see disjunct) + -iōn- -ion

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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Disjunction is always a great word to know.

So is ninnyhammer. Does it mean:

the offspring of a zebra and a donkey.

a fool or simpleton; ninny.

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Collins

World English Dictionary

disjunction (dɪsˈdʒʌŋkʃən)

—n
1.	Also called: disjuncture the act of disconnecting or the state of being disconnected; separation
2.	cytology the separation of the chromosomes of each homologous pair during the anaphase of meiosis
3.	logic
	a. the operator that forms a compound sentence from two given sentences and corresponds to the English or
	b. a sentence so formed. Usually written p∨q where p, q are the component sentences, it is true (inclusive sense) whenever either or both of the latter are true; the exclusive disjunction, for which there is no symbol, is true when either but not both disjuncts is
	c. the relation between such sentences

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage

Medical Dictionary

disjunction dis·junc·tion (dĭs-jŭngk'shən)
n.
The separation of homologous chromosomes during meiosis.

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Related Words

De Morgan's laws exclusive disjunction

inclusive disjunction disjuncture

Matching Quote

"Between the Christian and Roman ideals of the early centuries A.D. there is a disjunction which is perfect. Rome stands for corporate civic strength, Christianity (at least in its early stages when the Second Advent was a daily possibility) abominates all that is secular; Rome stands for a disciplined society in which tolerance allows all sorts to live together in peace, Christianity is a narrowly exclusive sect which shrinks apart. When Rome was doing all she could to hold together society and civilization, Christianity was becoming chief of the forces of disintegration. In the end Christianity triumphed but who shall say that the enemy was Rome? No doubt it shed (as unfeelingly as any fledgling) the shell which had fostered it; but the shell had been cracked from outside. Now it is a momentous happening that the beginnings of the Christian and the Roman imperial eras nearly coincide in time. The two were enemies from birth. The Roman Empire is dead, the Christian Church lives on. The Empire began in pride and splendor, the Church in humility and insignificance."

-Ralph Westwood Moore

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