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dissertation

[dis-er-tey-shuh n] /ˌdɪs ərˈteɪ ʃən/
noun
1.
a written essay, treatise, or thesis, especially one written by a candidate for the degree of Doctor of Philosophy.
2.
any formal discourse in speech or writing.
Origin
1605-1615
1605-15; < Latin dissertātiōn- (stem of dissertātiō), equivalent to dissertāt(us) (past participle of dissertāre; dissert- (see dissert) + -ātus -ate1) + -iōn- -ion
Related forms
dissertational, adjective
dissertationist, noun
Can be confused
dissertation, thesis.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for dissertational

dissertation

/ˌdɪsəˈteɪʃən/
noun
1.
a written thesis, often based on original research, usually required for a higher degree
2.
a formal discourse
Derived Forms
dissertational, adjective
dissertationist, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for dissertational

dissertation

n.

1610s, "discussion, debate," from Latin dissertationem (nominative dissertatio) "discourse," noun of action from past participle stem of dissertare "debate, argue, examine, harangue," frequentative of disserere "discuss, examine," from dis- "apart" (see dis-) + serere "to arrange words" (see series). Sense of "formal, written treatise" is 1650s.

Online Etymology Dictionary, © 2010 Douglas Harper
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