n., pl. elephant's foots.

1. An African species of yam (Dioscorea elephantipes) having unusual clusters of tubers that grow above the ground.
2. Any of several plants of the genus Elephantopus in the composite family, having small purplish flowers grouped in discoid flower heads.

IN BRIEF: n. - Any plant having heads of blue or purple flowers; South African vine having a massive rootstock covered with deeply fissured bark.

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The noun has 2 meanings:

Meaning #1: South African vine having a massive rootstock covered with deeply fissured bark
  Synonyms: tortoise plant, Hottentot bread vine, Hottentot's bread vine, Dioscorea elephantipes

Meaning #2: any plant of the genus Elephantopus having heads of blue or purple flowers; America

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