Esperanto

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Esperanto Wikipedia has an article on:
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Etymology

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sfero (sphere) +‎ -oido (similarity suffix)

Pronunciation

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  • IPA(key): /sferoˈido/
  • Hyphenation: sfe‧ro‧i‧do

Noun

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sferoido (accusative singular sferoidon, plural sferoidoj, accusative plural sferoidojn)

  1. (geometry) spheroid