present participle of get to first base

plural of fifty-first state

(finance) The first day on which an investor who holds a futures contract is notified that the commodity specified in the contract is about to be delivered.

plural of first notice day

plural of first-person dual

(uncommon) Unique and exceptionally different. / (uncommon) Something unique which appears in the earliest phases.

(uncommon) A unique example or type appearing in the earliest phases.

plural of first-of-its-kind

(military) An initial attack with nuclear weapons that disables the enemy's nuclear capability and thus prevents retaliation.

plural of splendid first strike