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abstract entity
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acknowledge
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absolutely
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over-the-top
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metic
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medium-size
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abreaction
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apologise
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cold
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blow out
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concavo-concave
concavo-concave /ˌkɑnkəvoʊˈkɑnkəv/
adjective
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Concave on both sides
(
biconcave
, concavo-concave
)
concave on both sides