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.

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.

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
References in periodicals archive ?
The gospel writers, while reciting for their scribes, came to the parable about the kingdom of God being like a mustard seed, and the writers could have simply forgotten to mention the next, pesky parable about the foolish, unclean woman who put unclean leaven in her dough and ruined the whole batch.
The Leaven Center is named after the parable (Luke 13:20-21) in which the Kingdom of God is likened to the leaven, or yeast, that a woman folded into three measures of flour to make the bread rise.
These are kingdom-of-God values and affect us as salt, leaven, and light.
The original commandment to eliminate leaven "found" in the home is linked to another verse which includes both that word and "search"; the second verse is linked to a verse which includes both "search" and "lamps," and that in turn is linked to the verse from Proverbs.
For this reason, the laity must heed the Vatican Council's call to become a leaven once again.
Suggestions for the renewal of parish and diocesan life such as reinstituting holy hours and adult catechism classes, if taken up, could be the little leaven that leavens the whole loaf.
But the huge increase in housing construction helped to leaven that news.
Leavens will work closely with copy desk chief, Paul Rainford, and Thomas to ensure the highest standards of written, pictorial and video content.
The NEMA economic forecasting team of Don Leavens and Tim Gill took top honors from The Wall Street Journal for accuracy in 2011.
Then, Captain Anne Steed and Company Sergeant Major Steve Leavens ordered the cadets to fall in before welcoming 17 new members.
95) presents challenging scientific information in a particularly accessible way, and leavens its message with personal anecdotes from the former Vice President's life.