Drilling :: Drilling (n.) The act of piercing with a drill.
Drilling :: Drilling (n.) A training by repeated exercises.
Drilling :: Drilling (n.) The act of using a drill in sowing seeds.
Drilling :: Drilling (n.) A heavy, twilled fabric of linen or cotton..
Quadrillion :: Quadrillion (n.) According to the French notation, which is followed also upon the Continent and in the United States, a unit with fifteen ciphers annexed; according to the English notation, the number produced by involving a million to the fourth power, or the number represented by a unit with twenty-four ciphers annexed. See the Note under Numeration..