I. mercurian adjective
Etymology: Mercury (god & planet) + English -an
obsolete : mercurial
II. mer·cu·ri·an (ˌ)mərˈkyu̇rēən noun
( -s )
Usage: usually capitalized
1. : one born under Mercury
2. : one that has a well-developed Mount of Mercury and a long and large finger of Mercury and that is usually held by palmists to be characterized by shrewdness, quickness, and energy