n. That which has a common center with something else. [ 1913 Webster ]
Its pecular relations to its concentrics. Coleridge. [ 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 ]
n. The state of being concentric. [ 1913 Webster ]