MECHANICAL a.
Pertaining to, governed by, or in accordance with, mechanics, or the laws of motion; pertaining to the quantitative relations of force and matter, as distinguished from mental, vital, chemical, etc.; as, mechanical principles; a mechanical theory; mechanical deposits.
MEDIUM n.
plication. Circulating medium, a current medium of exchange, whether coin, bank notes, or government notes. -- Ethereal medium (Physics), the ether. -- Medium of exchange, that which is used for effecting an exchange of commodities -- money or current representatives of money.
MINISTER n. 2 definitions
One to whom the sovereign or executive head of a government intrusts the management of affairs of state, or some department of such affairs. Ministers to kings, whose eyes, ears, and hands they are, must be answerable to God and man. Bacon.