Glossary Term Definition
The length of a line of type, usually expressed in picas or ems; also called line length or line measure.
Definition
The length of a line of type, usually expressed in picas or ems. Also called line length or line measure. Bringhurst recommends an average of 45 to 75 characters per line for single-column work, with 66 characters as the ideal.
Source
No access — Robert Bringhurst — p. 326:
The length of a line of type.