Flatfoot
Flatfoot: A foot in which the arch of the instep is flattened and the entire sole touches the ground. See: Flatfeet.
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- Flatulence
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.
- Flatulent
Flatulent: Pertaining to flatulence, the generation of excess gas in the intestinal tract. From the Latin flastus, meaning blowing, as a breeze or snort.
- Flatus
Flatus: Gas in the intestinal tract or gas passed through the anus. Intestinal gas contains numerous gases including oxygen, nitrogen, hydrogen, carbon dioxide, hydrogen sulfide, ammonia, and methane. The foul smell usually is caused by small traces of gases such as hydrogen sulfide, ammonia, and methane.
- Flaviviridae
Flaviviridae: A family of viruses transmitted by mosquitos and ticks that cause some important diseases, including dengue, yellow fever, tick-borne encephalitis virus, and West Nile fever. The flaviviruses are positive-strand RNA viruses containing three structural proteins and a host-derived lipid bilayer.
- Flavivirus
Flavivirus: One of a family of viruses transmitted by mosquitos and ticks that cause some important diseases, including dengue, yellow fever, tick-borne encephalitis, and West Nile fever. Flaviviruses have single-stranded RNA as their genetic material.