noun. For a standing wave, the region or point of maximum amplitude between adjacent nodes.

noun. A point of a vibrating string where the amplitude of vibration is greatest. It is at the middle of a loop or ventral segment, and half-way between two adjacent nodes.

noun. A region of maximum amplitude situated between adjacent nodes of a vibrating body, such as a string

noun. (physics) the point of maximum displacement in a periodic system

"By its very nature, this imminent node–antinode state is expected to make global temperature vary significantly above and below a common mean which itself may be approximately constant or may at certain times undergo relatively slow drifts."