The term 'Diamond Datum' is a combination of five words that are commonly used in the sport of baseball. The first word, 'STAT, ' is an abbreviation for statistic, which is a numerical measure of a player's performance. The second word, 'STEAL, ' refers to a base-stealing attempt by a runner. The third word, 'HIT, ' is a term used to describe when a batter successfully makes contact with the ball and reaches a base safely. The fourth word, 'RBI, ' stands for runs batted in, which is a statistic that measures the number of runs a player has driven in with their at-bats. Finally, the fifth word, 'Atbat, ' is an abbreviation for at-bat, which is the number of times a batter has attempted to HIT the ball during a game. Together, these five words form the term 'Diamond Datum, ' which is a comprehensive measure of a player's performance in the sport of baseball.