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ap-

 - 12 dictionary results

ap-

2 
var. of apo- before a vowel or h: aphelion.

apo-

 
a prefix occurring originally in loanwords from Greek, where it was joined to verbs, deverbal forms, and other parts of speech. Among its functions in Greek, apo- has the spatial sense “away, off, apart” (apogee; apocope; apostasy; apostrophe); it occurs with deverbals that denote a response or defense (apodosis; apology) and is found on verbs having perfective force relative to a corresponding simple verb (apoplexy; aposiopesis). In modern scientific coinages in English and other languages, apo- marks things that are detached, separate, or derivative (apocarpous; apoenzyme).
Also, especially before a vowel, ap-.

Origin:
< Gk, prefixal use of apó; akin to off, Skt apa, L ab
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To ap-
ad-  
pref.  

  1. ac- or af- or ag- or al- or ap- or as- or at- Toward; to. Before c, f, g, k, l, p, q, s, and t, ad- is usually assimilated to ac-, af-, ag-, ac-, al-, ap-, ac-, as-, and at-, respectively.

  2. Near; at: adrenal.


[Latin, from ad, to; see ad- in Indo-European roots.]
ap- 1  
pref.  Variant of ad-.
ap- 2  
pref.  Variant of apo-.
apo- or ap-  
pref.  

    1. Away from; off: aphelion.

    2. Separate: apocarpous.

  2. Without; not: apogamy.

  3. Related to; derived from: apomorphine.

  4. Metasomatic: apophyllite.


[Greek, from apo, away from; see apo- in Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

ap- 
patronymic prefix in Welsh names (cf. Ap Rhys = Price, Ap Evan = Bevan), earlier map "son," cognate with Gaelic mac.

apo- 
prefix meaning "from, away from, separate," from Gk. apo, from PIE base *apo- "off, away" (cf. Skt. apa "away from," Avestan apa "away from," L. ab "away from, from," Goth. af, O.E. of "away from").
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

ap- 1
pref.
Variant of ad-.

ap- 2
pref.
Variant of apo-.

apo- or ap-
pref.

  1. Away from; off: aponeurosis.

  2. Separate: apocrine.

  3. Without; lacking; not: apoferritin.

  4. Related to; derived from: apomorphine.

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