The Collaborative International Dictionary
Concentrical
Concentric \Con*cen"tric\, Concentrical \Con*cen"tric*al\, a. Having a common center, as circles of different size, one within another.
Concentric circles upon the surface of the water.
--Sir
I. Newton.
Concentrical rings like those of an onion.
--Arbuthnot.
Wiktionary
concentrical
a. (alternative form of concentric English)
WordNet
concentrical
adj. having a common center; "concentric rings" [syn: concentric, homocentric] [ant: eccentric]