## EnglishEdit

### EtymologyEdit

### NounEdit

**coplane** (*plural* **coplanes**)

- (mathematics)
*This term needs a definition. Please help out and***add a definition**, then remove the text`{{rfdef}}`

.**1980**, Jaya Srivastava,*Combinatorial Mathematics, Optimal Designs, and Their Applications*(page 61)- In Section 4 we show that any PMD in which a
**coplane**is not the intersection of two hyperplanes is an extension of a projective plane.

- In Section 4 we show that any PMD in which a