S: (n) navel, umbilicus, bellybutton, belly button, omphalos, omphalus (a scar where the umbilical cord was attached) "you were not supposed to show your navel on television"; "they argued whether or not Adam had a navel"; "she had a tattoo just above her bellybutton"
S: (n) McBurney's point (a point one third of the way along a line drawn from the hip to the umbilicus; the point of maximum sensitivity in acute appendicitis)
S: (n) node ((physics) the point of minimum displacement in a periodic system)
S: (n) antinode ((physics) the point of maximum displacement in a periodic system)
S: (n) beginning, origin, root, rootage, source (the place where something begins, where it springs into being) "the Italian beginning of the Renaissance"; "Jupiter was the origin of the radiation"; "Pittsburgh is the source of the Ohio River"; "communism's Russian root"
S: (n) midair (some point in the air; above ground level) "the planes collided in midair"
S: (n) abutment (point of contact between two objects or parts)
S: (n) position, place (the particular portion of space occupied by something) "he put the lamp back in its place"
S: (n) position (the appropriate or customary location) "the cars were in position"
S: (n) pressure point (any of several points on the body where the pulse can be felt and where pressure on an underlying artery will control bleeding from that artery at a more distal point)
S: (n) corner (the point where three areas or surfaces meet or intersect) "the corners of a cube"
S: (n) topographic point, place, spot (a point located with respect to surface features of some region) "this is a nice place for a picnic"; "a bright spot on a planet"