Pronunciation: (hôr-nē'tō; Sp. ôr-nē'tô), [key]
—pl. -tosPronunciation: (-tōz; Sp. -tôs). [key] Geol.
a low oven-shaped mound of congealed lava, common in some volcanic districts, emitting hot smoke and vapors in the final stages of activity.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.