Intestinal gaseousness caused by failure of the intestines to completely process some complex carbohydrates, such as those found in beans, onions and bran. Exercise may increase flatulence because it hastens the passage of food through the intestinal tract, sometimes not allowing enough time for complete digestion.
Excess gas in the intestinal tract. But excess flatulence is difficult to define without a yardstick to measure the "normal" frequency of gas passages. Symptom-free individuals have recorded approximately 14 passages of gas per 24 hours. From the Latin flastus, meaning blowing, as a breeze or snort.
Sense of fullness in the upper abdomen associated with a desire to belch. Sometimes this term is confused with the term flatus which, means gases in the intestine associated with distension and the removal of gas by way of the anus.
Flatulence is the presence of a mixture of gases known as flatus in the digestive tract of mammals. Flatus is expelled under pressure through the anus, usually accompanied by a distinct odor and sound, a process known informally as farting, or as passing gas. The non-odorous gases are mainly nitrogen (ingested), carbon dioxide (produced by aerobic microbes or ingested), and hydrogen (produced by some microbes and consumed by others), as well as lesser amounts of oxygen (ingested) and methane (produced by anaerobic microbes).