Definition of oil-nut in US English:

oil-nut

noun

  • 1More fully "oil-nut tree". Any of various trees or shrubs that produce oil-rich nuts or large seeds; specifically (a) the castor oil plant, Ricinus communis; (b) the butternut, Juglans cinerea; (c) the buffalo-nut, Pyrularia pubera; (d) the oil palm, Elaeis guineensis.

  • 2The nut or large seed of such a plant.

Origin

Late 17th century. From oil + nut.

Pronunciation

oil-nut

/ˈɔɪlnʌt/