concentrical

“The concentrical circles of the long-leaf pine (p. australis) are twelve times as numerous in the same space" [as of the loblolly pine].”

Agricultural, Geological, and Descriptive Sketches of Lower North Carolina, and the Similar Adjacent Lands

“The crystal sphere of thought is as concentrical as the geological structure of the globe.”

Nature: Addresses and Lectures (1849)

“Aristotle's wheel paradox: Rolling joined concentrical wheels seem to trace the same difference with their circumferences, even though the circumferences are different.”

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“It is worthy remark, that frequently when we break one vesicle, we meet with another v/ithin it, and concentrical.”

Internet Archive: A General collection of the best and most interesting voyages and travels in all parts of the world [microform] : many of which are now first translated into English : digested on a new plan

“Strongly attracted by scientific and mathematical research, in the 1970s she experimented with engravings in copper and white metal, in which dynamical systems of curves, Archimedes’s spirals and wide or concentrical spaces alternate.”

Paola Levi-Montalcini.