Truffle

Wikipedia Word definitions in Wikipedia
Hognut or pignut can mean any of a number of unrelated plants: Bunium bulbocastanum (Black Cumin) or Conopodium majus (Kippernut) of the Apiaceae rushpeas , particularly Hoffmannseggia glauca (Indian Rushpea) and Hoffmannseggia densiflora , of the Fabaceae ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Hognut \Hog"nut`\, n. (Bot.) The pignut. See Hickory . In England, the Bunium flexuosum , a tuberous plant.

Wiktionary Word definitions in Wiktionary
n. 1 (context US English) The pignut or hickory ((taxlink Carya glabra species noshow=1) of family Juglandaceae). 2 (context UK English) (taxlink Conopodium majus species noshow=1), a tuberous plant of the Apiaceae. 3 (taxlink Bunium bulbocastanum species ...