earthapple

noun4

1. •
   A Jerusalem artichoke (the tuber of Helianthus tuberosus); the plant that produces it.
2. •
   (rare) A potato; the plant that produces it.

   • It was supper-time on board the Stormchaser, and the sky pirates were all seated round a longbench tucking into a meal of baked snowbird and earthapple mash. — 2009
3. •
   (historical) The fruit of the mandrake (Mandragora officinarum); the plant itself.
4. •
   (no longer used) Any of various tubers or the tuberous plants that produce them, especially sowbread (genus Cyclamen).