Definition of common for Students. 1  1 : affecting, belonging to, needed by, or used by everybody for the common good a common room. 2  2 : shared by two or more individuals or by the members of a family or group a common ancestor. 3  3 : 1general 1 common knowledge. 4  4 : occurring, appearing, or used frequently a common sight a common name.
1 Apple cider vinegar is highly acidic. 2  The main ingredient is acetic acid, which is quite harsh. 3  You should always dilute it with water or juice before swallowing. 4  Pure, straight apple cider vinegar could damage your tooth enamel or the tissues of your mouth and throat. Apple cider vinegar is highly acidic. 2  The main ingredient is acetic acid, which is quite harsh. 3  You should always dilute it with water or juice before swallowing. 4  Pure, straight apple cider vinegar could damage your tooth enamel or the tissues of your mouth and throat.
Vinegar. Acetic acid (also called ethanoic acid) is a weak organic acid. Unlike a lot of other food additives, acetic acid is commonly used in home cooking. Acetic acid is what gives vinegar its distinctive sour taste and pungent smell.Common table vinegar is diluted acetic acid. Usually it is about 4% to 8% by mass.escription: Vinegar. Acetic acid (also called ethanoic acid) is a weak organic acid. Unlike a lot of other food additives, acetic acid is commonly used in home cooking. Acetic acid is what gives vinegar its distinctive sour taste and pungent smell. Common table vinegar is diluted acetic acid.