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There are 3 seventeen-letter words containing PTERID

lyginopteridaleanpyrimidopteridinethelypteridaceous

3 definitions found

  • lyginopteridalean — n. (Botany) Any of the order Lyginopteridales of archetypal pteridosperms.
  • pyrimidopteridine — n. (Organic chemistry) A tricyclic heterocycle formed by fusion…
  • thelypteridaceous — adj. (Botany) Belonging to the family Thelypteridaceae of ferns.
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