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ontological
ontological argument
ontology
onus
onward
onychogryphosis
onycholysis
onychomycosis
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onychophoran
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oogamy
o·og·a·my [ ō óggəmee ]


noun 
Definition:
 
reproduction with gametes: reproduction in which a small motile male sex cell fuses with a large immobile female sex cell, as happens, e.g. when a sperm fuses with an egg

o·og·a·mous adjective
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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