Having many angles; hence characteristic of a polygon.(adjective)
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Use "polygonal" in a sentence
"This style of masonry is called polygonal and is to be carefully distinguished from Cyclopean, as above defined."
"The oblong versions have twice as many links for their respective construction types one is more "polygonal" than the other but has more links, and they also texture much more efficiently and retain shape better from afar."
"Among other projects, John upgraded the fortifications at Dover Castle and ordered a state-of-the-art polygonal tower at Odiham, Hampshire, one of his prime hunting spots."