Inhabitant of the Fourth Planet From the Sun
This page is the CodyCross answer for the clue below from Physics, Group 1900, Puzzle 3 (Insulators).
Question is: Inhabitant of the Fourth Planet From the Sun
and the answer is: MARTIAN
Word Meaning:
MARTIAN — (nonstandard) Alternative letter-case form of Martian (“of or pertaining to the planet Mars”).
Definitions from Wiktionary.