from The American Heritage® Dictionary of the English Language, 4th Edition
- adv. At full length: an article reprinted in extenso in a later collection.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adv. At full length.
from The Century Dictionary and Cyclopedia
- n. At full length; in full; withot abridgment: as, to print a paper in extenso.
Latin in extēnsō : in, at + extēnsō, ablative of extēnsus, stretch.(American Heritage® Dictionary of the English Language, Fourth Edition)