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First attested in 1828, from Latin cȳmat(is) (“sprout, swelling, hollow sphere”) +‎ -ic, stem of cȳma, from Ancient Greek κῡ́μᾰτος (kū́mătos, “wave, billow, swell, sprout, fetus”), genitive of κῦμα (kûma). Compare the latter cymatics (1966) and the earlier Latin cȳmaticus (1753).

cymatic (not comparable)

1828, John Preston Neale, Views of the Seats of Noblemen and Gentlemen, in England, Wales, Scotland, and Ireland, second series, volume IV, “Fingask Castle, Perthshire; The Seat of Sir Patrick Murray Threipland, Bart.Fingask Castle, Perthshire; The Seat of Sir Patrick Murray Threipland, Bart.”

The roof is surrounded by an embrasured parapet. But the most curious external feature of this building, is the principal entrance door, strongly studded with large nails; the upper part having a cymatic form.

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