An Etymological Dictionary of Astronomy and Astrophysics

The pod or the enclosed edible seed of the plant, Arachis hypogaea, of the legume family: the pod is forced underground in growing, where it ripens (Dictionary.com). → box-peanut bulge.

Etymology (EN): From pea, → green pea galaxy + nut O.E. hnutu, akin to L. nux, → nucleus.