The sole is the bottom of the foot.
In humans the sole of the foot is anatomically referred to as the plantar aspect. The equivalent surface in ungulates is the hoof.
Famous quotes containing the word sole:
“Theres only one way for an individual to remain upright, not to fall to pieces, not to sink into the mire of self-oblivion ... or self-contempt. Thats calmly to turn away from everything, to say, Enough! and, folding ones useless arms across ones empty breast, to retain the ultimate, the sole attainable virtue, the virtue of recognizing ones own insignificance.”
—Ivan Sergeevich Turgenev (18181883)