|the depression in the center of the surface of the abdomen indicating the point of attachment of the umbilical cord to the embryo; navel.|
|the basinlike cavity in the lower part of the trunk of many vertebrates, formed in humans by the innominate bones, sacrum, etc.|
|1.||in force, effect, or operation|
|2.||exerting force or influence|
|3.||producing a desired effect; significant: the operative word|
|4.||of or relating to a surgical procedure|
|5.||a worker, esp one with a special skill|
|6.||(US) a private detective|
operative op·er·a·tive (ŏp'ər-ə-tĭv, -ə-rā'tĭv, ŏp'rə-)
Of, relating to, or resulting from a surgical operation.
Functioning effectively; efficient.