Fourth Base in Baseball

This page is the CodyCross answer for the clue below from Inventions, Group 55, Puzzle 2.

Question is: Fourth Base in Baseball

and the answer is: HOMEPLATE

Word Meaning:

HOME PLATE — (baseball) A flat, pentagonal, rubber object placed at the center of the batter's box, which is used as a basis for judging pitched strikes and balls, and the touching of which by a runner advancing from or past third base scores a run.

Definitions from Wiktionary.