say it: SFIR-oyd
spheroid is a noun meaning "a shape that is generated by rotating an ellipse around one of its axes". It carries one recorded sense.
a shape that is generated by rotating an ellipse around one of its axes
“it looked like a sphere but on closer examination I saw it was really a spheroid”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for spheroid come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.