Ear point
Keywords: Shape, Go term
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.