Fót-gemearc

According to the Old English Dictionary:

es;

fót-gemearc

n. A foot-mark, length of a foot; ūnius pĕdis longĭtūdo :-- Se légdraca wæs fíftiges fótgemearces lang the fire-dragon was fifty feet of measure long, Beo. Th. 6077; B. 3042. fot-gemearc