Nickname for a Baseball Playing Field

This page is the CodyCross answer for the clue below from Sports, Group 154, Puzzle 4 (Competitive Freediving).

Question is: Nickname for a Baseball Playing Field

and the answer is: DIAMOND

Word Meaning:

DIAMOND — (uncountable) A glimmering glass-like mineral that is an allotrope of carbon in which each atom is surrounded by four others in the form of a tetrahedron.

Definitions from Wiktionary.

Nickname for a baseball playing field — CodyCross Answer | CodyCross Solutions