ab-

ab-

a formal element occurring in loanwords from Latin, where it meant “away from”: abdicate; abolition.
Also, a-, abs-.


Origin:
< Latin ab (preposition and prefix) from, away, cognate with Greek apó, Sanskrit ápa, German ab, English of1, off

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World English Dictionary
ab-1
 
prefix
away from; off; outside of; opposite to: abnormal; abaxial; aboral
 
[from Latin ab away from]

ab-2
 
prefix
denoting a cgs unit of measurement in the electromagnetic system: abvolt
 
[abstracted from absolute]

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

ab-
prefix, from L. ab-, ab "off, away from," from PIE base *apo- (see apo-).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

ab- 1
pref.
Away from: abaxial.

ab- 2
pref.
Used to indicate an electromagnetic unit in the centimeter-gram-second system: abcoulomb.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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