leavening agent

[lev-uh-ning]

leav·en·ing

[lev-uh-ning]
noun
1.
Also called leavening agent. a substance used to produce fermentation in dough or batter; leaven.
2.
the act or process of causing to ferment by leaven.
3.
leaven (def. 3).

Origin:
1600–10; leaven + -ing1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Leavening agent is always a great word to know.
So is interrobang. Does it mean:
a scrap or morsel of food left at a meal.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
Encyclopedia Britannica
Encyclopedia

leavening agent

substance causing expansion of doughs and batters by the release of gases within such mixtures, producing baked products with porous structure. Such agents include air, steam, yeast, baking powder, and baking soda.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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