different between tetrakaidecahedron vs tetrakaidekahedron

English

From tetrakaideca- +? -hedron.

tetrakaidecahedron (plural tetrakaidecahedrons or tetrakaidecahedra)

From tetrakaideka- +? -hedron.

tetrakaidekahedron (plural tetrakaidekahedrons or tetrakaidekahedra)

(mathematics) A solid figure having fourteen faces.
- 2011, Terence Allen and Graham Cowling, The Cell: A Very Short Introduction, Oxford 2011, p. 81:
  Two large flat surfaces and twelve edge facets make each squame a fourteen-sided solid or tetrakaidecahedron.

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