Home plate. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/home-plate
(plural home plates)
(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.
English Wiktionary. Available under CC-BY-SA license.