The Clue Prefix between kilo- and giga-
The Answer MEGA
The answer to the crossword clue is "MEGA." In the metric system, "mega-" is a prefix that represents one million or 10^6. It comes between "kilo-" (which means one thousand or 10^3) and "giga-" (which means one billion or 10^9). Therefore, "mega" correctly fits the clue as the prefix that falls between kilo and giga.