Foot may also refer to:
Foot (unit), a unit of length, now usually 0.3048 m or 12 inches
Foot of a perpendicular, in geometry, a point where perpendicular lines intersect
Foot, an alternate name for the fotmal, a unit of weight usually equal to 70 pounds
Foot (hieroglyph), an ancient Egyptian symbol
Foot (prosody), meter in poetry
Foot (sewing), part of a sewing machine
Foot (sailing), the lower edge of a sail
Infantry; see List of Regiments of Foot
Foot Clan, a group of ninja in the Teenage Mutant Ninja Turtles series
Foot (mollusc), part of the typical mollusc body plan along with the shell, viscera, and mantle
Foot Lake, a lake in Minnesota
Foot orienteering, the sport of orienteering
FOOT may also refer to:
ICAO code for Tchibanga Airport
The Faculty of Optics and Optometry of Terrassa, Polytechnic University of Catalonia
Foothill Independent Bancorp (NASDAQ: FOOT), California bank acquired in 2005 by First National Bancorp, now PacWest Bancorp
Historically the "foot" was a part of many local systems of units, including the Greek, Roman, Chinese, French, and English systems. It varied in length from country to country, from city to city, and sometimes from trade to trade. Its length was usually between 250 mm and 335 mm and was generally, but not always, subdivided into 12 inches or 16 digits.
The United States is the only industrialized nation that uses the international foot and the survey foot (a customary unit of length) in preference to the meter in its commercial, engineering, and standards activities. The foot is legally recognized in the United Kingdom; road signs must use imperial units (however distances on road signs are always marked in yards, not feet), while its usage is widespread among the British public as a measurement of height. The foot is recognized as an alternative expression of length in Canada officially defined as a unit derived from the meter although both the U.K. and Canada have partially metricated their units of measurement. The measurement of altitude in international aviation is one of the few areas where the foot is widely used outside the English-speaking world.
The length of the international foot corresponds to a human foot with shoe size of 13 (UK), 14 (US male), 15.5 (US female) or 46 (EU sizing).
Historically the human body has been used to provide the basis for units of length. The foot of a white male is typically about 15.3% of his height, giving a person of 160 cm (5 ft 3 in) a foot of 245 mm and one of 180 cm (5 ft 11 in) a foot of 275 mm. These figures are less than the foot used in most cities over time, suggesting that the "foot" was actually a synonym for a "shoe".
Archeologists believe that the Egyptians, Ancient Indians and Mesopotamians preferred the cubit while the Romans and the Greeks preferred the foot. Under the Harappan linear measures, Indus cities during the Bronze Age used a foot of 13.2 inches (333.5 mm) and a cubit of 20.8 inches (528.3 mm). The Egyptian equivalent of the foota measure of four palms or 16 digitswas known as the djeser and has been reconstructed as about 30 cm (12 in).
The Greek foot (, pous) had a length of 1600 of a stadion, one stadion being about 181.2 m, therefore a foot being at the time about 302 mm. Its exact size varied from city to city and could range as much as between 270 mm and 350 mm, but lengths used for temple construction appear to have been about 295 mm to 325 mm, the former being close to the size of the Roman foot.
The standard Roman foot (pes) was normally about 295.7 mm (97% of today's measurement), but in the provinces, the pes Drusianus (foot of Nero Claudius Drusus) was used, with a length of about 334 mm. (In reality, this foot predated Drusus.)
Originally both the Greeks and the Romans subdivided the foot into 16 digits, but in later years, the Romans also subdivided the foot into 12 unciae (from which both the English words "inch" and "ounce" are derived).
After the fall of the Roman Empire, some Roman traditions were continued but others fell into disuse. In AD 790 Charlemagne attempted to reform the units of measure in his domains. His units of length were based on the toise and in particular the toise de l'critoire, the distance between the fingertips of the outstretched arms of a man. The toise has 6 pieds (feet) each of 326.6 mm (12.86 in).
He was unsuccessful in introducing a standard unit of length throughout his realm: an analysis of the measurements of Charlieu Abbey shows that during the 9th century the Roman foot of 296.1 mm was used; when it was rebuilt in the 10th century, a foot of about 320 mm was used. At the same time, monastic buildings used the Carolingian foot of 340 mm.
The procedure for verification of the foot as described in the 16th century by Jacob Koebel in his book Geometrei. Von knstlichem Feldmessen und absehen is:
Stand at the door of a church on a Sunday and bid 16 men to stop, tall ones and small ones, as they happen to pass out when the service is finished; then make them put their left feet one behind the other, and the length thus obtained shall be a right and lawful rood to measure and survey the land with, and the 16th part of it shall be the right and lawful foot.