Antinode

An antinode is the opposite of a node: a point where a standing wave swings through its full peak amplitude every cycle. On a string in its nth mode, antinodes lie halfway between adjacent nodes, so there are exactly n of them.

Antinodes are where the energy is — the medium is doing its most violent work there. If you want to excite a particular mode most efficiently, drive the system at one of its antinodes. If you want to kill a mode, clamp it at an antinode. This is how a guitarist plays artificial harmonics: lightly touching the string at a node forbids modes that don't have a node there, leaving only the higher harmonics to ring out.