a large granular cell, common in connective tissue, that produces heparin, histamine, and serotonin.
a type of granular basophil cell in connective tissue that releases heparin, histamine, and serotonin during inflammation and allergic reactions
mast cell n.
A cell found in connective tissue that contains numerous basophilic granules and releases substances such as heparin and histamine in response to injury or inflammation of bodily tissues. Also called labrocyte, mastocyte.
A granular cell found in body tissue, especially connective tissue, that activates inflammation by releasing a variety of chemical substances including histamine, tumor necrosis factor, and interleukins. Mast cells have membrane receptors that bind to bacteria, triggering the release of inflammatory mediators from the mast cell’s cytoplasmic granules. Mast cells also play an important role in allergic reactions. Other receptors on their membranes bind to specific antibodies that, combined with certain antigens, initiate granular release of chemical mediators that cause allergic signs and symptoms.
- Mast cell leukemia
mast cell leukemia n. See basophilic leukemia.
noun, Nautical. 1. a pierced slab of hardwood built into the deck structure of a small ship or boat to receive the force of the mast, which is fitted tightly through it. 2. Also called mast hasp. a metal collar fitted to a thwart of a small boat to steady a mast.
noun, Nautical. 1. a partial lining sewed to the back of a square sail to prevent chafing from contact with the mast. 2. Also called mast cover. a cloth covering part of a mast to protect it against smoke from a funnel.
noun a woman who has undergone a mastectomy