1623, "to foretell, prophesy," from L.
prædicatus, pp. of
prædicere "foretell, advise, give notice," from
præ- "before" +
dicere "to say" (see
diction). Scientific sense of "to have as a deducible consequence" is recorded from 1961.
Prediction is recorded from 1561, from L.
prædictio "a foretelling," from
prædictus.
Predictably "as could have been predicted" is attested from 1914.