I. kənˈsen.trik, (ˈ)kän|s-, -rēk adjective
also con·cen·tri·cal -rə̇kəl, -rēk-
Etymology: Medieval Latin concentricus, from Latin com- + centrum center + -icus -ic — more at center
1.
a. : having a common center (as circles one within another) — opposed to eccentric
b. : having a common axis (as of two or more cones or moraines) : formed about the same axis : coaxial
2. geology : marked by the loosening and falling away of successive rounded or spherical shells
concentric weathering
concentric exfoliation
• con·cen·tri·cal·ly -rə̇k(ə)lē, -rēk-, -li adverb
II. noun
( -s )
: something (as one of two concentric circles) that has a common center with something else