cone

plural cones

1. geometryA surface of revolution formed by rotating a segment of a line around another line that intersects the first line.
2. geometryA solid of revolution formed by rotating a triangle around one of its altitudes.
3. mathematicsA space formed by taking the direct product of a given space with a closed interval and identifying all of one end to a point.
4. Anything in the general shape of a cone.
   1. The fruit of a conifer or a similarly shaped fruit or flower head of certain other plants, such as banksias and proteas.

      Synonyms: strobilus, strobile

   2. 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.
   3. An ice cream cone.

      Synonyms: cornet, ice cream cone

   4. A traffic cone.
   5. broadlyslangA passenger on a cruise ship (that needs to be navigated around).
   6. slangA cone-shaped cannabis joint.
   7. A shell of the genus Conus, having a conical form.
5. anatomyAny of the small cone-shaped structures in the retina.
6. slangThe bowl piece on a bong.
   1. slangThe process of smoking cannabis in a bong.
7. category theoryAn 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.)

   1 more example

   A cone is an object (the apex) and a natural transformation from a constant functor (whose image is the apex of the cone and its identity morphism) to a diagram functor. Its components are projections from the apex to the objects of the diagram and it has a “naturality triangle” for each morphism in the diagram. (A “naturality triangle” is just a naturality square which is degenerate at its apex side.)

8. computingA 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.

present singular third person cones · participle present coning · participle past coned · past coned

1. transitiveTo fashion into the shape of a cone.
2. intransitiveTo form a cone shape.

   Under the old method the material coned at the bottom of the borehole and as a result it would not go under houses and buildings.

   1971, United States. Congress. House Appropriations, Department of the Interior and Related Agencies Appropriations for 1972 (part 3, page 69)

3. frequently followed by "off"To segregate or delineate an area using traffic cones.

   The area occupied by the works should be coned off and the usual advance warning signs should be provided on all approaches

   2006, Great Britain: Department for Transport, “D5 Single Carriageway Roads”, in Traffic Signs Manual, Part 1, The Stationery Office, →ISBN, paragraph D5.12.3, page 140

4. transitiveTo place a traffic cone on (a statue, etc.) as a prank.

plural Cones

1. countableuncountableA surname.
2. countableuncountableAn unincorporated community in Milan Township, Monroe County, Michigan, United States.
3. countableuncountableAn unincorporated community in Crosby County, Texas, United States.