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单词 focaloid
释义

Definition of focaloid in English:

focaloid

noun ˈfəʊkəlɔɪd
Mathematics
  • A shell bounded by two confocal ellipsoidal surfaces, especially (in early use) one that is infinitely thin.

Origin

Late 19th century; earliest use found in William Thomson (1819–1890), archbishop of York. From focal + -oid.

Definition of focaloid in US English:

focaloid

nounˈfəʊkəlɔɪd
Mathematics
  • A shell bounded by two confocal ellipsoidal surfaces, especially (in early use) one that is infinitely thin.

Origin

Late 19th century; earliest use found in William Thomson (1819–1890), archbishop of York. From focal + -oid.

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更新时间:2025/6/19 5:05:34