underfeeder

English

Etymology

under- +‎ feeder or underfeed +‎ -er

Noun

underfeeder (plural underfeeders)

1. (engineering) A device that feeds in material from below.
   • 1890, The Review of Reviews, volume 2, page 29:

     He speaks well of Andrews' Helix Underfeeder, by which the fire is always fed from below.