oil-nut
/ˈɔɪlnʌt/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.