I. |mərkə|tōrēəl, -tȯr- adjective
Etymology: Latin mercatorius, from mercator merchant, from mercatus (past participle of mercari to trade) + -or — more at merchant
archaic : mercantile
II. adjective
Usage: usually capitalized
Etymology: Gerhardus Mercator + English -ial
: of or relating to the geographer Mercator or his method of projection
Mercatorial bearings