One of the mysteries of the English language finally explained.
To the same degree, rank, or status at another university or institution; by virtue of having previously attained that degree or status at a different university.
Early 18th century; earliest use found in Spectator. From post-classical Latin ad eundem, short for ad eundem gradum to the same degree from classical Latin ad + eundem, accusative of īdem + gradum, accusative of gradus.
ad eundem/ˌad ɪˈʌndəm/
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