D defs.my
Entry 1 sense Webster, 1913

Heelspur

· Heel·spur · IPA
01 n. A slender bony or cartilaginous process developed from the heel bone of bats. It helps to support the wing membranes. See Illust. of Cheiropter.
  1. 1.
    A slender bony or cartilaginous process developed from the heel bone of bats. It helps to support the wing membranes. See Illust. of Cheiropter.(Zool.) See: Cheiropter