noun.
The ordinal number matching the number million in a series.
noun.
One of a million equal parts.
The Century Dictionary and Cyclopedia
Ten hundred thousandth; being one of a million.
noun.
One of a million parts; the quotient of unity divided by a million; a ten hundred thousandth part.
the GNU version of the Collaborative International Dictionary of English
adjective.
Being the last one of a million of units or objects counted in regular order from the first of a series or succession; being one of a million.
noun.
The quotient of a unit divided by one million; one of a million equal parts.