subconical
/ˌsʌb.kənɪˈkɪl/Definitions
1. adjective
Having a cone-shaped form that is smaller at the base than at the apex.
“The subconical structure of the volcano’s crater was a result of its unique geological formation.”
2. noun
A cone-shaped solid that is smaller at the base than at the apex.
“The subconical shape of the sculpture was an interesting feature of the modern art piece.”