cryptopodia

A swelling of the lower part of the leg and the foot, in such a manner that there is great distortion and the sole seems to be a flattened pad. [crypto- + G. pous, foot]

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cryp·to·po·dia (krip″to-poґde-ə) [crypto- + Gr. pous foot] swelling of the lower part of the leg and dorsum of the foot that covers all but the soles of the feet.