Plural of antapex, an alternative plural form emphasizing the Latin etymological plural (Latin 'apex' can pluralize to 'apices').
Latin-influenced plural of 'antapex,' using the '-ices' ending common in Latin-derived English words alongside the Anglicized '-es' plural form.
English speakers love using fancy Latin plurals sometimes—'antapices' sounds more scholarly than 'antapexes,' which is why you'll see both versions in older astronomy textbooks!
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