an active volcano in the S Philippines, on S Mindanao: highest peak in the Philippines. 9690 feet (2954 meters).
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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-.

< Greek, prefixal use of apó; akin to off, Sanskrit apa, Latin ab


Army & Air force Post Office.
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World English Dictionary
Apo (ˈɑːpəʊ)
the highest mountain in the Philippines, on SE Mindanao: active volcano with three peaks. Height: 2954 m (9690 ft)

apo- or ap-
1.  away from; off: apogee
2.  indicating separation of: apocarpous
3.  indicating a lack or absence of: apogamy
4.  indicating derivation from or relationship to: apomorphine
[from Greek apo away, off]
ap- or ap-
[from Greek apo away, off]

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

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, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

apo- or ap-

  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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American Heritage
Abbreviations & Acronyms
  1. apoenzyme

  2. apolipoprotein

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The American Heritage® Abbreviations Dictionary, Third Edition
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