Conical means shaped like a cone. A conical hat, conical flask, conical roof.
The conical flask in a laboratory is shaped that way so it can be swirled without spilling, which is the whole reason for it. Volcanoes and shells are the usual natural examples.
1adjectiveconicalShaped like a cone.
“Farmers in Vietnam wear conical hats to keep off the sun and rain.”
conical is a shape.
From conic + -al.
Etymology from Wiktionary, CC BY-SA