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octahedron (n.)
[octahedron 词源字典]
1560s, from Greek
oktahedron
, neuter of
oktahedros
"eight-sided," from
okta-
"eight" (see
octa-
) +
hedra
"seat" (see
sedentary
). Related:
Octahedral
.
[octahedron etymology, octahedron origin, 英语词源]
[octahedron 词源字典]