Learn more: Angina is chest pain or discomfort caused when your heart muscle doesn't get enough oxygen-rich blood. It may feel like pressure or squeezing in your chest. The discomfort also can occur in your shoulders, arms, neck, jaw, or back.Angina pain may even feel like indigestion.But, angina is not a disease.earn more: Angina is chest pain or discomfort caused when your heart muscle doesn't get enough oxygen-rich blood. It may feel like pressure or squeezing in your chest. The discomfort also can occur in your shoulders, arms, neck, jaw, or back. Angina pain may even feel like indigestion.
Definition of leaven. 1a : a substance (such as yeast) used to produce fermentation in dough or a liquid; especially : sourdoughb : a material (such as baking powder) used to produce a gas that lightens dough or batter.
The leavening agent is used in the bread to make a dough rise & to get light, tender bread. The early Hebrews used sour dough as a leaven, but the Egyptians were the first to discover that sour dough contained yeast. They were able to segregate this plant & so became the first people to produce a âyeast raisedâ bread. The Hebrews baked their bread in thin sheets & broke it instead of cutting it.