spade foot

noun2

1. •
   A block-shaped foot higher than wide and tapering slightly toward the bottom. The spade foot usually terminates a tapering leg, and the top of the foot is wider than the leg.

   • The spade foot leg may be used as an alternate design. — 1929
2. •
   The foot that is habitually used to put pressure on a spade when digging.

   • Nevertheless, one foot is generally used in preference to the other in such movements as digging (hence sometimes called the spade foot), in hopping, in making a leap, &c. — 1896