A thin, brittle, unleavened bread traditionally eaten during the Jewish Passover holiday. Tradition states that matzo is made only with water and flour but some modern-day versions include flavorings like onion. Matzo can be found in Jewish markets as well as most supermarkets. See also matzo meal.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.