oxyconic

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oxyconic (comparative more oxyconic, superlative most oxyconic)

1. (malacology, of a shell or fossil) Having a flattened crossection, the halves joining at an acute angle.

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