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单词 orbitoid
释义 orbitoid|ˈɔːbɪtɔɪd|
[f. mod.L. orbitoīdes, f. orbita orbit n.; see -oid.]
The flat round fossil shell of a Foraminifer of the genus Orbitoides, occurring in tertiary limestones in N. America, etc.
1885Amer. Jrnl. Sc. XXX. 70, I found..a small specimen of an Orbitoid.
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