Refrigerator Predecessor; Slabs of Frozen Water

This page is the CodyCross answer for the clue below from Fauna and Flora, Group 171, Puzzle 1 (Common Ancestor).

Question is: Refrigerator Predecessor; Slabs of Frozen Water

and the answer is: ICEBOX

Word Meaning:

ICEBOX — A box or compartment containing ice, typically used to keep provisions cool.

Definitions from Wiktionary.