(neuroanatomy) The part of the autonomic nervous system that raises blood pressure and heart rate, constricts blood vessels, and dilates the pupils when under stress.

A little effort expended sooner to fix a small problem prevents it from becoming a larger problem requiring more effort to fix later. / A little preparation can eliminate the need for repairs later.

(US, informal) A one-hundred dollar banknote. / (music) The lowest note of an instrument, written below the staff and the D note.

Alternative form of nonflammable

Synonym of up to here

plural of non-maskable interrupt

Either of the small pieces on many eyeglasses that rest on the wearer's nose. / The small leathery part of a cat's nose

(finance) A document saying that someone owes a specific amount of money to someone else, often with the deadline and interest fees; the primary purposes of a promissory note are to evidence the debt obligation incurred, and to establish terms for payment thereof.

(idiomatic) A situation where the permitting of some small act will lead to a larger undesirable act or circumstance.

plural of national park