Ma'anar ƙamus na kalmar "centrum" ita ce tsakiyar ɓangaren tsarin jiki ko gabobin jiki, kamar kashin baya ko ginshiƙan kashin baya. Hakanan yana iya komawa zuwa tsakiyar yanki ko tsakiyar birni ko birni, ko babban ɓangaren gini. A cikin ilmin halitta, ana amfani da kalmar sau da yawa don nufin tsakiyar sashin kwayar halitta ko tsakiyar yankin kwayoyin halitta.
