It is an obtuse conoid, closed with a star-shaped disk.
"The Life of the Spider" by J. Henri Fabre
From some experiments I made myself a score of years ago, I am inclined to prefer a plane surface for the conoid to work upon.
"Scientific American Supplement, No. 447, July 26, 1884" by Various
He also wrote on conoids and spheroids.
"Beacon Lights of History, Volume III" by John Lord
Many different forms have been given to the heads of projectiles, as flat, ogival, hemispherical, conoidal, parabolic, blunt trifaced, etc.
"Scientific American Supplement, No. 803, May 23, 1891" by Various
A crust of conoidical shells covered the rock at certain points, the dry rot of the granite.
"Toilers of the Sea" by Victor Hugo
Its conoid shape may class it with the one shown in Fig.
"The Archaeology of the Yakima Valley" by Harlan Ingersoll Smith
With a conoidal orifice the coefficient was 0.961 at 55 deg.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 1" by Various