Ancient Solar Clock
This page is the CodyCross answer for the clue below from Under the sea, Group 37, Puzzle 4.
Question is: Ancient Solar Clock
and the answer is: SUNDIAL
Word Meaning:
SUNDIAL — A device measuring the time of day by the position of a shadow cast by a pole or plate (gnomon) upon an engraved series of marks.
Definitions from Wiktionary.