by a factor of a million

the number that is represented as a one followed by 6 zeros

a very large indefinite number (usually hyperbole)

a more or less definite period of time now or previously present

an arithmetic operation that is the inverse of division; the product of two numbers is computed

a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation

the blood group whose red cells carry the A antigen

one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

the 1st letter of the Roman alphabet