\Plan"ti*grade\, a. [L. planta sole of the foot +
gradi to walk: cf. F. plantigrade.] (Zo["o]l.)
(a) Walking on the sole of the foot; pertaining to the
    plantigrades.
(b) Having the foot so formed that the heel touches the
    ground when the leg is upright.

\Plan"ti*grade\, n. (Zo["o]l.)
A plantigrade animal, or one that walks or steps on the sole
of the foot, as man, and the bears.