leaven


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leaven

(lĕv`ən), agent used to raise bread or other flour foods. Physical leavens include water vapor, which is released as steam at high temperatures (as in popovers), and air, which is incorporated by beating. Chemical leaven (baking powder and baking soda) and biological leavens (yeasts and certain bacteria) raise the mixture by the formation of carbon dioxide gas, which is expanded by heat. Some of the earliest leavens were barm, a yeast of fermenting malt liquor, and sourdough, a portion saved from a mass of dough as a starter for the next batch.
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leaven

[′lev·ən;]
(food engineering)
A substance (such as yeast) used to produce fermentation.
A substance such as yeast or baking powder used to produce a gas to lighten dough.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

leaven

1. any substance that produces fermentation in dough or batter, such as yeast, and causes it to rise
2. a piece of such a substance kept to ferment a new batch of dough
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
20 Ye shall eat nothing leavened; in all your habitations shall ye eat unleavened bread.
Jesus enjoined them, "Watch out, guard against the leaven of the Pharisees and the leaven of Herod." They concluded among themselves that it was because they had no bread.
Like the search for physical leaven, we need to be intentional in our attempts to collect all of the parts of who we've been that are not nourishing, that are dragging us down.
Whenever we think the dignity of a whole institution is more important than the life and well-being of even one child, we are feeling the influence of the leaven that plagued the Pharisees.
Winemaker's Choice went to Visconti's of Leaven worth.
But if you see the church as leaven, in the world and very much part of it, doing its work slowly and carefully, then you believe that the individual who commits this kind of failure needs to be taken to account, as we would do in any community of integrity.
Then Jesus started telling them that the kingdom of God is like a woman who is so foolish that she tries to hide leaven, the yeast, in bread dough and subsequently leavens the whole batch of dough.
* A high proportion of water-based liquid ingredients produce enough steam to leaven. * A high-protein flour is used to give structure.
Most of the Trustees would be nationals of the countries concerned, with a leaven of UN-avouched non-nationals, operating transparent accounts and open processes.
Dennis Webb, Pacific Councillor was with us to add leaven to any party.
Bureau Bouwtechniek, Antwerp Bureau voor Architectuur en Stabiliteit, Leaven Roelandt and Rys, Leaven Daidalos, Leaven Theater Technieken Advies en Studie, Ghent
Salterton trilogy Series of novels by Davies, Robertson , consisting of Tempest-Tost (1951), Leaven of Malice (1954), and A Mixture of Frailties (1958).