Made without yeast or any other leavening agent: unleavened bread. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "unleavened" in a sentence
"The result is a hard compact substance known as unleavened bread."
"When it is said, then, that they were going to eat the Pasch on the fifteenth day of the month, it is to be understood that the Pasch there is not called the Paschal lamb, which was sacrificed on the fourteenth day, but the Paschal food -- that is, the unleavened bread -- which had to be eaten by the clean."
"He positively refused to touch the sad bread, as my Yankee neighbours very appropriately termed the unleavened cakes in the pan; and it was no easy matter to send a man on horseback eight miles to fetch a loaf of bread."