What is "Aeturnum" ???

Armored Thrax said:
I may be exposing my IQ level, but what the hell does "Aeturnum" mean???
This is what I could find that is close...

http://www.bartleby.com/61/25/I0072500.html

The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.

in aeternum

SYLLABICATION: in ae·ter·num
PRONUNCIATION: -tûrnm
ADVERB: To eternity; forever.
ETYMOLOGY: Latin : in, in, for + aeternum, all the time to come, from neuter accusative of aeternus, eternal.