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pentagraph

noun
pen·​ta·​graph | \ˈpentəˌgraf, -rȧf\

Definition of pentagraph 

: a cluster of five successive letters

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Other Words from pentagraph

pentagraphic \ ¦⸗⸗¦grafik \ adjective
pentagraphically \ -​fə̇k(ə)lē \ adverb

History and Etymology for pentagraph

penta- + -graph

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