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abecedarius
academy award
isolation
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abashed
requires
bijou
debut
precincts
18-karat gold
heterodyne oscillator
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concave polyhedron
concave polyhedron
/ˈkɒnˈkeɪv ˌpɒlɪˈhiːdrən/
noun
A polyhedron some of whose plane sections are concave polygons
(
concave polyhedron
)
a polyhedron some of whose plane sections are concave polygons
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