unleavened bread
Bread made without yeast or other leavening agents; used in religious and dietary contexts. The cross-reference 種無しパン is a synonym.
See also: 種なしパン
Unleavened bread is eaten during Passover.
Compound of 無 (mu, 'without'), 発酵 (hakkou, 'fermentation'), and パン (pan, 'bread'). A straightforward modern technical term.