|a fool or simpleton; ninny.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
angiotensin an·gi·o·ten·sin (ān'jē-ō-těn'sĭn)
Any of a group of peptides with vasoconstrictive activity that function physiologically in controlling arterial pressure.
|angiotensin (ān'jē-ō-těn'sĭn) Pronunciation Key
Any of three polypeptide hormones that function in the body in controlling arterial pressure. The most important is known as angiotensin II, a powerful vasoconstrictor that stimulates steroid production by the adrenal glands, reduces fluid loss from the kidneys, and also functions as a neurotransmitter. Angiotensin II is formed from inactive angiotensin I by the action of angiotensin-converting enzyme (or ACE). See also ACE inhibitor, renin.