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Meaning of nyctaginaceous

nyc•ta•gi•na•ceous

Pronunciation: (nik"tu-ju-nā'shus), [key]
— adj.
  1. belonging to the Nyctaginaceae, the four-o'clock family of plants. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.