Line That Connects Opposite Corners of a Square
This page is the CodyCross answer for the clue below from Treasure Island, Group 1026, Puzzle 4 (International Waters).
Question is: Line That Connects Opposite Corners of a Square
and the answer is: DIAGONAL
Word Meaning:
DIAGONAL — (geometry) Joining two nonadjacent vertices (of a polygon or polyhedron).
Definitions from Wiktionary.