A whole number that can be divided by another number with no remainder.
14, 21 and 70 are multiples of 7
Price-earnings ratio.
One of a set of the same thing; a duplicate.
A single individual who has multiple personalities.
One of a set of siblings produced by a multiple birth.
A chain store.
A discovery resulting from the work of many people throughout history, not merely the work of the person who makes the final connection.