buffalo nut

from The Century Dictionary.

• noun The fruit of the North American shrub Pyrularia oleifera.
• noun The plant itself. Also called oil-nut.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun shrub of southeastern United States parasitic on roots of hemlocks having sparse spikes of greenish flowers and pulpy drupes
• noun oily drupaceous fruit of rabbitwood