The Collaborative International Dictionary
Pentagonally
Pentagonally \Pen*tag"o*nal*ly\, adv.
In the form of a pentagon; with five angles.
--Sir T. Browne.
Wiktionary
pentagonally
adv. In the form of a pentagon; with five angles.
Usage examples of "pentagonally".
They are about 3' high, covered over with complex but now eroded swirls, spaced 50' apart, arranged pentagonally, & cut -- in some unknown manner supplying us with a great deal of argumentative fuel -- from the underlying granite.