septilateral

sep·ti·lat·er·al

 (sĕp′tə-lăt′ər-əl)
adj.
Seven-sided.

[Latin septem, seven; see septet + lateral.]

septilateral

(ˌsɛptɪˈlætərəl)
adj
(Mathematics) having seven sides
References in periodicals archive ?
Sections of the novel such as Sowelu crashing into the children's backyard, Thurisaz and the Septilateral belong to the original.