gutta-percha: a whitish rubber derived from the coagulated milky latex of gutta-percha trees; used for insulation of electrical cables
gum: any of various substances (soluble in water) that exude from certain plants; they are gelatinous when moist but harden on drying
sclerodermataceae: a family of fungi or order Sclerodermatales with a single-layered peridium; includes earthballs