Anything shaped like a cone
A Catalan surface all of whose rulings intersect some fixed line
A solid formed by the revolution of a conic section about its axis
The pineal gland
Shaped like a cone; conical.
Any such artefact
Of a class of knapped stone points, made without a stem, shoulders, notches, or other features that aid in attachment to a shaft.
Having the general shape of a lance; much longer than wide, with the widest part lower than the middle and a pointed apex.