bouma shape
n.— «Taylor & Taylor used these Bouma shapes for a study on the text of their own book, and found that the Bouma shape uniquely specified 6953 out of 7848 words in the sample.» —“Off-line Handwriting Recognition: A Review and Experiments” by A.W. Senior Cambridge University Engineering Dept. Dec., 1992. (source: Double-Tongued Dictionary)