Shadow-Casting Blade on a Sundial

This page is the CodyCross answer for the clue below from Space Exploration, Group 902, Puzzle 2 (Magnetic Field).

Question

Shadow-Casting Blade on a Sundial

Answer

GNOMON

Word Meaning:

GNOMON — An object such as a pillar or a rod that is used to tell time by the shadow it casts when the sun shines on it, especially the pointer on a sundial.

Definitions from Wiktionary.

Shadow-casting blade on a sundial Space Exploration Answers