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oogonium
ooh
Ookpik
oolite
oolong
oom
oompah
oomph
oomycete
oophorectomy
oophoritis
oops
Oort cloud
oose
oosphere
oospore
Oostende
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oocyst
o·o·cyst [ ṓ ə sìst ] (plural o·o·cysts)


noun 
Definition:
 
a fertilized gamete of sporozoan: a fertilized gamete of parasitic organisms sporozoans that is enclosed in a thick wall
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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