a formal discourse or treatise in which a subject is examined and discussed; dissertation.

1595–1605; < Latin disquīsītiōn- (stem of disquīsītiō), equivalent to disquīsīt(us) (past participle of disquīrere to investigate; dis- dis-1 + quaerere to seek, ask) + -iōn- -ion

disquisitional, adjective
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World English Dictionary
disquisition (ˌdɪskwɪˈzɪʃən)
a formal written or oral examination of a subject
[C17: from Latin disquīsītiō, from disquīrere to make an investigation, from dis-1 + quaerere to seek]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1605, "subject for investigation," also "systematic search," from L. disquisitionem (nom. disquisitio), from stem of disquirere "inquire," from dis- "apart" + quærere "seek, ask" (see query). Sense of "long speech" first recorded 1647.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The fun is imagining what form the filmic disquisition will take.
At this time, demonology belonged to the realms of theological disquisition.
Further proofs of the reality of demoniacs are reserved for a particular
Being a disquisition on the tendency of good resolves to dissolve.
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