{ , a. [ F. concentrique. See Concenter. ] Having a common center, as circles of different size, one within another. [ 1913 Webster ]
Concentric circles upon the surface of the water. Sir I. Newton. [ 1913 Webster ]
Concentrical rings like those of an onion. Arbuthnot. [ 1913 Webster ]
adv. In a concentric manner. [ 1913 Webster ]