scrivello /skri-VEL-oh/. noun. A small elephant tusk weighing “less than 20 lb,” according to the OED or “of a small size commonly used for making billiard balls” by Merriam-Webster. Likely from the Portuguese, a variant of escaravelho (pin, peg).
“The horn is a small scrivello with a large oblong hole near the point, so as to act as a speaking trumpet…” (Richard Francis Burton)
“The bits of ivory and related memorabilia that his father had kept—tusk tips, a scrivello—had been scattered…” (John Walker)
“At its conclusion, a fearful uproar is made by the scrivello horns, called Kpwen, the sound being like that of a chorus of lusty jackasses.” (J. Alfred Skertchly)