plural noun Eq·ui·se·ta·les

Definition of Equisetales

  1. :  an order of lower tracheophytes (subdivision Sphenopsida) that have the sporangiophores inserted directly on the axis and have existed since the Devonian — see calamariaceae, equisetaceae — compare archaeocalamites

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Origin and Etymology of equisetales

New Latin, from Equisetum + -ales

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