Dad. n.s. [The child's way of expressing father. It is remarkable, that, in all parts of the world, the word for father, as first taught to children, is compounded of a and t, or the kindred letter d differently placed; as tad, Welsh; ἄττα, Greek; atta, Gothick; tata, Latin. Mammas atque tatas habet Afra, Mart.] Father.
I was never so bethumpt with words,
Since first I call'd my brother's father dad. Shakesp. K. John.
His loving mother left him to my care;
Fine child, as like his dad as he could stare! Gay.