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Webster 1913 Edition

‖

Noun.

[A dim. fr. Sp.

horno

oven, L.

furnus

. See

(Geol.)

A low, oven-shaped mound, common in volcanic regions, and emitting smoke and vapors from its sides and summit.

Humboldt.

hornito ‎(plural hornitos or hornitoes)

(geology) A low, oven-shaped mound, common in volcanic regions, emitting smoke and vapours from its sides and summit.
- 1832, The travels and researches of Alexander von Humboldt
  When Humboldt visited this place, the natives assured him that the heat of the hornitos had formerly been much greater. The thermometer rose to 203° when placed in the fissures exhaling aqueous vapour.