Which of the following is the correct definition of a waistline?

The waistline in calligraphy is a specific term that refers to the line up to which lowercase letters reach and from which they start, making it a crucial part of letter formation. This line helps in establishing uniformity and consistency in the height of lowercase letters, particularly those characters that have ascenders and descenders. By defining this height, calligraphers can ensure that their writing maintains a balanced appearance and conforms to the stylistic rules of the script they are employing.

Understanding the waistline is essential for any calligrapher, as it directly impacts the legibility and aesthetic quality of the handwritten text. It serves as a guide for positioning various elements of the letters, ensuring that they are neither too tall nor too short relative to one another, which can significantly influence the overall flow and harmony of the written piece.