Antæus, a mythical giant, a terræ filius or son of the earth, who was strong only when his foot was on the earth, lifted in air he became weak as water, a weakness which Hercules discovered to his discomfiture when wrestling with him. The fable has been used as a symbol of the spiritual strength which accrues when one rests his faith on the immediate fact of things.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Anstruther, East and West * Antal`cidas