Phaenomena
Phaenomena is the English plural form of the noun phaenomenon, reflecting an older transliteration of the Greek phainomenon (φαινόμενον) and its plural phainomena (φαινόμενα). In modern English, the standard plural of phenomenon is phenomena. The spelling phaenomena is now largely historical or used to preserve the original Greek spelling in scholarly contexts or in quotations and titles that imitate antiquity. The root phain- means to appear or be shown, from the Greek verb phainesthai “to appear,” and the suffix -omenon forms a noun meaning “a thing that appears”; the plural -omena yields phaenomena in English transliteration.
The term appears in several contexts: as a general plural form in older or classical-language scholarship, in