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lifespan
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roundabout
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vacuum
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antidiuretic hormone
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ancestor
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privateer
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explode
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concavo-concave
concavo-concave /ˌkɑnkəvoʊˈkɑnkəv/
adjective
-
Concave on both sides
(
biconcave
, concavo-concave
)
concave on both sides