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zygomatic arch
zygomatic bone
zygomatic process
zygomorphic
zygomycete
zygosis
zygosity
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zygotene
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zwitterion
zwit·ter·i·on [ zwíttə r ən, swíttə r ən ] (plural zwit·ter·i·ons)


noun 
Definition:
 
ion with two poles: an ion that has both a negative and a positive pole
[Early 20th century. < German, "hybrid ion"]
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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