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corollary

[kawr-uh-ler-ee, kor-; especially British, kuh-rol-uh-ree] /ˈkɔr əˌlɛr i, ˈkɒr-; especially British, kəˈrɒl ə ri/
noun, plural corollaries.
1.
Mathematics. a proposition that is incidentally proved in proving another proposition.
2.
an immediate consequence or easily drawn conclusion.
3.
a natural consequence or result.
Origin of corollary
1325-1375
1325-75; Middle English < Late Latin corollārium corollary, in Latin: money paid for a garland, a gift, gratuity. See corolla, -ary
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for corollary

corollary

/kəˈrɒlərɪ/
noun (pl) -laries
1.
a proposition that follows directly from the proof of another proposition
2.
an obvious deduction
3.
a natural consequence or result
adjective
4.
consequent or resultant
Word Origin
C14: from Latin corollārium money paid for a garland, from Latin corolla garland, from corōnacrown
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for corollary
n.

late 14c., from Late Latin corollarium "a deduction, consequence," from Latin corollarium, originally "money paid for a garland," hence "gift, gratuity, something extra;" and in logic, "a proposition proved from another that has been proved." From corolla "small garland," diminutive of corona "crown" (see crown (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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corollary in Science
corollary
  (kôr'ə-lěr'ē)   
A statement that follows with little or no proof required from an already proven statement. For example, it is a theorem in geometry that the angles opposite two congruent sides of a triangle are also congruent. A corollary to that statement is that an equilateral triangle is also equiangular.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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