platyconic

From platy- +‎ conic.

platyconic (comparative more platyconic, superlative most platyconic)

1. (malacology, of a shell or fossil) Having a flattened cross-section from its side.

• (flattened): oxyconic

• “platyconic”, in OneLook Dictionary Search.
• William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “platyconic”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.

• nyctalopic