Definition of post-pyramidal in US English:

post-pyramidal

adjective

  • Subsequent to the building of the Egyptian pyramids.

Origin

Late 19th century; earliest use found in Richard Proctor (1837–1888), astronomer and science writer. From post- + pyramid + -al.

Pronunciation

post-pyramidal

/ˌpəʊs(t)pɪˈramɪdl/