Hoppus foot noun a unit of volume equal to 1.27 cubic feet, applied to timber in the round, the cross-sectional area being taken as the square of one quarter of the circumference Liberaldictionary.com
Word Origin for Hoppus foot C20: named after Edward Hoppus, 18th-century English surveyor Collins English Dictionary – Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012