pentagonally en · ADV
Etymology
From pentagonal + -ly.
Meanings
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(not-comparable) In the form of a pentagon; with five angles.
[T]he flovvers before explication are pentagonally vvrapped up, vvith ſome reſemblance of the blatta or moth from vvhence it hath its name: […]
1658, Thomas Browne, “The Garden of Cyrus. […]. Chapter III.”, in Hydriotaphia, Urne-buriall, […] Together with The Garden of Cyrus, […], London: […] Hen[ry] Brome […], →OCLC, page 139: