I. ˈmärshən, ˈmȧsh- adjective
Usage: often capitalized
Etymology: Latin Mart-, Mars, the 4th planet from the sun (from stella Martis, literally, star of Mars, after Mars Roman god of war and agriculture; translation of Greek Areōs astēr, literally, star of Ares, Greek god of war) + English -ian
: of or relating to the planet Mars or its hypothetical inhabitants
II. noun
( -s )
Usage: usually capitalized M
1. : a hypothetical inhabitant of the planet Mars
2. : one that is usually held by palmists to be characterized by qualities of aggression or resistance and sometimes an inflammable temper as a result of prominent development of Upper Mars, Lower Mars, or the Plain of Mars