cone

Definitions

• (geometry) A surface of revolution formed by rotating a segment of a line around another line that intersects the first line.
• (geometry) A solid of revolution formed by rotating a triangle around one of its altitudes.
• (topology) A space formed by taking the direct product of a given space with a closed interval and identifying all of one end to a point.
• Anything shaped like a cone.
• The fruit of a conifer.
• A cone-shaped flower head of various plants, such as banksias and proteas.
• An ice cream cone.
• A traffic cone
• A unit of volume, applied solely to marijuana and only while it is in a smokable state; roughly 1.5 cubic centimetres, depending on use.
• (anatomy) Any of the small cone-shaped structures in the retina.
• (slang) The bowl piece on a bong.
• (slang) The process of smoking cannabis in a bong.
• (slang) A cone-shaped cannabis joint.
• (slang) A passenger on a cruise ship (so-called by employees after traffic cones, from the need to navigate around them)
• (category theory) An object V together with an arrow going from V to each object of a diagram such that for any arrow A in the diagram, the pair of arrows from V which subtend A also commute with it. (Then V can be said to be the cone’s vertex and the diagram which the cone subtends can be said to be its base.)
• A shell of the genus Conus, having a conical form.
• A set of formal languages with certain desirable closure properties, in particular those of the regular languages, the context-free languages and the recursively enumerable languages.