sandbox tree

noun

1. a tropical American tree, Hura crepitans, of the spurge family, bearing a furrowed, roundish fruit about the size of an orange that when ripe and dry bursts with a sharp report and scatters the seeds.

noun

1. a tropical American euphorbiaceous tree, Hura crepitans, having small woody seed capsules, which explode when ripe to scatter the seeds: formerly used to hold sand for blotting ink