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Meaning of semisubterranean

sem•i•sub•ter•ra•ne•an

Pronunciation: (sem"ē-sub"tu-rā'nē-un, sem"ī-), [key]
— adj.
  1. half below the surface of the ground: the semisubterranean houses of some Indian tribes.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.