/kəʊn; kon/
n
1 solid body that narrows to a point from a circular flat base （实心的）圆锥体. =>illus at cube 见cube之插图.
2 solid or hollow thing that has this shape, eg an edible container for ice-cream, a warning sign for road-works, etc （实心的或中空的）圆锥形物（如用以盛冰激凌的可食的锥形蛋卷、修路时放置的锥形警告路标等）. =>illus at App
1 见附录1之插图, page xiii.
3 fruit of certain evergreen trees (fir, pine, cedar) made of overlapping woody scales 球果（某些常绿树, 如枞、松、雪松的果实）. =>illus at App
1 见附录1之插图, page i.

v (phr v) cone sth off mark or separate sth with cones 用锥形标志标明或隔开
*cone off a section of motorway during repairs 用锥形标志隔开维修中的一段高速公路
* cone off parking spaces that must not be used 用锥形标志标明不准使用的停车位置.

Ionisation cones are cones of material extending out from spiral galaxies. They are visible because of their emissions which are believed to be from re-emission of photons produced by nuclear activity within the galaxy itself.