CHALLAH
challah, hallah
(noun) (Judaism) a loaf of white bread containing eggs and leavened with yeast; often formed into braided loaves and glazed with eggs before baking
Source: WordNet® 3.1
Etymology
Noun
challah (countable and uncountable, plural challahs or challos or challot or challoth)
(countable) A traditional bread eaten by Ashkenazi Jews, usually braided for the Sabbath and round for Yom Tov.
(uncountable) The commandment to separate a portion of bread or bread dough for the cohanim (Numbers 15:17–21); in contemporary practice, the portion is burned until inedible.
(countable) The portion separated in fulfillment of the above.
Source: Wiktionary