# conoid

> a ruled surface, whose rulings (lines) fulfill the additional conditions that ① all rulings are parallel to a plane (the directrix plane) and ② all rulings intersect a fixed line (the axis)

**Wikidata**: [Q1638628](https://www.wikidata.org/wiki/Q1638628)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Conoid)  
**Source**: https://4ort.xyz/entity/conoid


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)