lypressin: an antidiuretic and vasoconstrictor used to treat diabetes insipidus
vasoconstrictor: any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure
flat tip screwdriver: a screwdriver with a flat wedge-shaped tip that fits into a slot in the head of a screw