ab initio[ab′i nis̸h′ē ō′, -nis̸h′ō]
ab initio definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
from the beginning
Origin: Classical Latin
ab initio definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
From the beginning.
Origin: Latin ab initiō : ab, from + initiō, ablative of initium, beginning.
ab initio - Legal Definition
From the first act. From the beginning; back to one’s creation or inception.