Phalangese
Acromegaly is the term meaning enlargement of the hands and feet.
Feet is the plural term for foot. So 19 feet = 19 feet.
The estimating term is "linear" feet and is a measurement in a line.
Feet and lineal feet are the same measurement - lineal feet is merely used as a term to distinguish feet from square or cubic feet.
Find a common term There are 3 feet in 1 yard 36 feet/3 feet=12 yards
False leg or a False Foot
Pedi
Inferior - towards the feet (Opposite: Superior - towards the head)
1 Foot = 0.3048 Meters. 1640.41995 Feet. (In a simpler term: 1,640')
18 inches = 1.5 feet, so 18 inches : 10 feet = 1.5 feet : 10 feet = 3 : 20
If you mean feet that rest flat on the ground as opposed to on the toes (as seen in dogs) the term you're looking for is plantigrade. Humans, bears and raccoons have plantigrade feet, since they walk on the soles of their feet, wearas dogs and cats are digitigrade because they walk on their toes (digits.)
The term 'false feet' is the plural form; the singular form is 'false foot'.