Wikipedia Reference Information
Foot washing or washing of feet is a religious rite observed as an ordinance by several Christian denominations. The name, and even the spelling, of this practice is not consistently established, being variously known as feet washing, foot washing, feetwashing, footwashing, washing the saints' feet, washing of feet, pedilavium, and mandatum.
The foot-washing was an example, a pattern. Many groups throughout church history have practiced literal foot-washing as a church ordinance. However, present culture in many lands does not call for the need to wash dust from the feet of one's guests. Whereas the Lord's Supper was practiced by the early church, it apparently did not practice foot-washing as an ordinance in church gatherings.
The complete, up-to-date and editable article about Feet Washing can be found at Wikipedia: Feet Washing