length
Also known as persistence, the length of a wine is measured (in seconds) by the amount of time its bouquet and flavor linger after swallowing. The longer it lingers, the finer the wine.
The New Wine Lovers Companion, 2nd Edition, by Ron Herbst and Sharon Tyler Herbst. Copyright © (1) 2003, 1995 by Ron Herbst and Sharon Tyler Herbst. Reprinted by arrangement with Barron's Educational Series, Inc.