any substance that decreases transpiration and, usually, photosynthesis
antitropic antitropic an·ti·tro·pic (ān’tĭ-trō’pĭk) adj. Bilaterally symmetrical but in an opposite direction, as the right thumb to the left thumb.
- Antitrust legislation
antitrust legislation Laws passed in the United States, especially between 1890 and 1915, to prevent large business corporations, called trusts, from combining into monopolies to restrict competition. The laws were instituted to encourage free enterprise. (See also trust busting.) Note: The enforcement of antitrust laws has been inconsistent. Note: Although the Bell Telephone system was […]
antitrypsin antitrypsin an·ti·tryp·sin (ān’tē-trĭp’sĭn, ān’tī-) n. A serum protein that inhibits the activity of trypsin and other proteolytic enzymes.
- Antitrypsin deficiency
antitrypsin deficiency antitrypsin deficiency n. An inherited deficiency of a trypsin-inhibiting serum protein, that may increase one’s susceptibility to emphysema and cirrhosis.