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onstage
-ont
Ont.
ont-
Ontario
Ontario, Lake
ontic
onto
onto-
ontogeny
ontological
ontological argument
ontology
onus
onward
onychogryphosis
onycholysis
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onto-

onto-


prefix 
Definition:
 
1. being, existence
ontology

2. organism
ontogeny

[< Greek ont-, present participle of einai "be" < Indo-European]
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