carbon monoxide. 1. a colorless, odorless, poisonous gas, CO, that burns with a pale-blue flame, produced when carbon burns with insufficient air: used chiefly in organic synthesis, metallurgy, and in the preparation of metal carbonyls, as nickel carbonyl. Origin of carbon monoxide. 1870-1875.
Indigestion (Dyspepsia) Definition and Facts. Indigestion is a general term that describes a group of gastrointestinal symptoms that occur together, including pain, a burning feeling, or discomfort in your upper abdomen; feeling full too soon while eating; and feeling uncomfortably full after eating.
1 Your indigestion symptoms change noticeably. 2  Your symptoms last longer than a few days. 3  You have unexplained weight loss. 4  You have sudden, severe abdominal pain. 5  You have trouble swallowing. 6  You have yellow coloring of the skin and eyes (jaundice).  You vomit blood or pass blood in the stool.