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Definition Tartaric acid is a crystalline organic acid that exists in four isomeric forms and occurs widely in plants. It occurs naturally in many plants,…

About Enzyme Definition Enzyme is any of numerous proteins produced in living cells that accelerate or catalyze the metabolic processes of an organism. All chemical…

Finding the Third Angle of a Triangle Finding the third angle of a triangle when you know the measurements of the other two angles is…

Pericardium Definition Pericardium is the membrane sac that encloses the heart in vertebrate animals. The pericardium’s outer coat (the parietal pericardium) is tough and thickened,…

About Lactic Acid Definition Lactic acid is a syrupy, water-soluble organic acid formed during the fermentation of the milk sours or certain fruits. The chemical…

Finding the Fourth Angle of a Quadrilateral Angles are measured in degrees, written °. The maximum angle is 360°. This is the angle all the…

Preservative Definition Preservative is a substance added to food products or to organic solutions to prevent decomposition due to chemical change or bacterial action. In…

Fibroblast Definition Fibroblast is a cell that manufactures and maintains connective tissue, the structural framework that supports the organs of all animals. It is responsible…

Penicillium Definition Penicillium is any of various bluish-green fungi of the genus Penicillium, that grow as molds on decaying fruits, ripening cheeses, and bread, and…

Atomic Clock Definition Atomic clock is an extremely precise clock whose rate is controlled by a periodic process, such as vibration, or the absorption or…

About Common Cold Definition Common cold is a respiratory infection caused by any of several viruses, such as adenovirus or rhinovirus, in which the mucous…

Vitamin C Definition Vitamin C is a water-soluble vitamin important for healthy skin, teeth, bones, and blood vessels. It is found especially in citrus fruits,…