English

Adverb

ab aeterno ‎(comparative more ab aeterno, superlative most ab aeterno)

1. From time immemorial; from an infinitely remote point in the past.^[1]

References

1. ↑ Philip Babcock Gove (editor), Webster's Third International Dictionary of the English Language Unabridged, G. & C. Merriam Co. (1976), ISBN 0-87779-101-5.

Latin

Etymology

ab + aeternus

Adverb

ab aeternō

1. Since a very long time ago.