Definition of apo- in English:
apo-
prefix
1Away from.
‘apocrypha’- ‘apostrophe’
- 1.1Separate.
- ‘apocarpous’
2Astronomy
Denoting the furthest point in the orbit of a body in relation to the primary.Compare with peri-- ‘apolune’
Origin
From Greek apo ‘from, away, quite, un-’.
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