Martian
adjective
[ ˈmɑːʃ(ə)n ]
• relating to the planet Mars or its supposed inhabitants.
• "the Martian atmosphere"
Martian
noun
• a hypothetical or fictional inhabitant of Mars.
• "a nest of Martians"
Origin:
late Middle English (in the senses ‘subject to Mars's influence’ and ‘martial’): from Latin Mars, Mart- (see Mars) + -ian.