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rarefaction
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World English Dictionary
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rara avis
ra·ra a·vis
[
rérrə áyviss,
rérrə ávvəss
]
(
plural
ra·rae a·ves
[
rèrree áy vz
]
or
ra·ra a·vis·es
)
noun
Definition:
something rare:
somebody or something that is rarely encountered
[
From Latin, literally "rare bird"
]
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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