1911 Encyclopædia Britannica (1911)
“ In printing the bottom of a type is divided by a groove into two portions known as “feet.” Probably referring to the beating of the rhythm with the foot in dancing, the Gr. ποῦς and Lat. pes were applied in prosody to a grouping of syllables, one of which is stressed, forming the division of a verse. “Foot,” i.e. foot-soldier, was formerly, with an ordinal number prefixed, the name of the infantry regiments of the British army. It is now superseded by territorial designations, but it still is used in the four regiments of the infantry of the Household, the Foot Guards. ”
