Any treatment of an ore used to concentrate its valuable constituents (minerals) into products (concentrate) of smaller bulk, and simultaneously to collect the worthless material (gangue) into discardable waste (tailings).

Teutonic Knights / A decoration awarded by the Nazi Party

(idiomatic) To make a decision, especially after a period of delay; to either take action now or forgo the opportunity.

(vulgar, idiomatic, imperative) Act now or state one's disinterest, make a decision, particularly in contexts where one is inconveniencing others by inaction and indecision.

plural of first order stream

(stock market) A conditional order placed with a stockbroker (or similar) to close one's position if the market drops (or rises in some cases) to a specified price level.

plural of gag order

(law) An order issued by a court prohibiting specified persons from discussing a case outside limitations set by the court.

the bony ridge beneath the eyebrow; the browbone

The longest river in South Africa.