in extenso

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in ex·ten·so

 (ĭn ĕk-stĕn′sō)
At full length: an article reprinted in extenso in a later collection.

[Latin in extēnsō : in, at + extēnsō, ablative of extēnsus, stretch.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

in extenso

(ɪn ɪkˈstɛnsəʊ)
(Literary & Literary Critical Terms) at full length
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

in ex•ten•so

(ɪn ɪkˈstɛn soʊ)

adv. Latin.
at full length.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

in extenso

A Latin phrase meaning at full length.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited

in extenso

advin extenso; (= at length)ausführlich; (= in full)vollständig, ungekürzt
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
References in classic literature ?
Nothing has been too small to escape him, and you may be sure that if Charles Strickland left a laundry bill unpaid it will be given you in extenso , and if he forebore to return a borrowed half-crown no detail of the transaction will be omitted.
This book, now for the first time printed in extenso (a very noble passage from it found place in that prose advertisement to The Excursion), is the great novelty of this latest edition of Wordsworth's poetic works.
These are exemplified by several lengthy expositions of work Flyvbjerg considers admirably phronetic, but which exemplars are perhaps better read in extenso.