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ONI
onigiri
onion
onion dome
onionskin
Onitsha
-onium
onium ion
onkus
onlay
online
online debit card
onliner
onload
onlooker
only
onomasiology
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ontogeny
on·tog·e·ny [ on tójjənee ] or on·to·gen·e·sis [ òntə jénnəssiss ]


noun 
Definition:
 
development of individual to maturity: the development of an individual from a fertilized ovum to maturity, as contrasted with the development of a group or species phylogeny

on·to·gen·ic [ òntə jénnik ] adjective
on·to·gen·i·cal·ly [ òntə jénni kəlee ] adverb
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