heptagonal

[ hep-tag-uh-nl ]

/ hɛpˈtæg ə nl /

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adjective

having seven sides or angles.

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His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Origin of heptagonal

First recorded in 1605–15; heptagon + -al¹

Words nearby heptagonal

heptachlor, heptachord, heptad, heptadecanoic acid, heptagon, heptagonal, heptahedron, heptahydrate, heptamerous, heptameter, heptane

How to use heptagonal in a sentence

It is a little heptagonal recess, paved with white marble and roofed with a shell-like cupola of marble of a single block.
Southern Spain|A.F. Calvert
Meshes regular or subregular, hexagonal, often intermingled with a variable number of pentagonal and heptagonal meshes.
Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index|Ernst Haeckel
Meshes subregular pentagonal (intermingled with single tetragonal, hexagonal, and heptagonal meshes).
Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index|Ernst Haeckel
Shell-mantle one and a third times as long as broad, its frontal perimeter heptagonal, with seven concave sides.
Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index|Ernst Haeckel

The effect of a heptagonal stem on an octagonal base or plinth is certainly odd.
Bell's Cathedrals: The Abbey Church of Tewkesbury|H. J. L. J. Mass