pentagonal

adjective pen·tag·o·nal \ pen-ˈta-gə-nᵊl \

Definition of pentagonal

1 :having five sides and five angles
2 :having a pentagon as a cross section or as a base
  • a pentagonal pyramid

pentagonally

play \pen-ˈta-gə-nᵊl-ē\ adverb

Recent Examples of pentagonal from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pentagonal.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of pentagonal

1571



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