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spheroid (n.)[spheroid 词源字典]: "body resembling, but not identical with, a sphere," 1560s, from Latin sphaeroides, from Greek sphairoeides "ball-like, spherical," from sphaira (see sphere) + -oeides "form" (see -oid). As an adjective from 1767. Related: Spheroidal.[spheroid etymology, spheroid origin, 英语词源]