[JET v.2 + -ER1.]

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  1.  Cornish Mining. (See quot.)

2

1778.  Pryce, Min. Cornub., Gloss., Pokkers and Jetters, are blocks or pullies, over which the sweep rods of some engines move and play.

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  2.  That which jets or throws out; in quot., a geyser.

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1869.  Baring-Gould, Orig. Relig. Belief (1878), II. i. 2. Sprinkled with boiling water from a jetter in Iceland.

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