'Flash boiler' definitions:

Definition of 'Flash boiler'

From: GCIDE
  • Flash boiler \Flash boiler\ A variety of water-tube boiler, used chiefly in steam automobiles, consisting of a nest of strong tubes with very little water space, kept nearly red hot so that the water as it trickles drop by drop into the tubes is immediately flashed into steam and superheated. [Webster 1913 Suppl.]