Ear point
Two known similar usages.
The ear of Black's marked one-point jump is the point with on it. It's a typical reduction technique.
With a two-point jump in the centre of the board, the number of ways of cutting is quite large. From the point of view of shape, occupying an ear point (said to have been called that by Kitani Minoru) sets up some of the best sequences. White plays at the marked point, or a, b, c.
White's follow-up to an ear point play.
For example White makes a table shape and leaves two cutting points at d and e.
Tamsin would like to note: The table shape is strong, but an incomplete table shape can be subject to a table point play, similar to taking the fourth point of a bamboo joint.