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Aortic Arch Definition Aortic arch is the curved portion between the ascending and descending portions of the aorta, lying behind the manubrium and giving rise…

Maleic Acid Definition Maleic acid is a geometric isomer of fumaric acid, having two carboxyl groups (COOH) on the same side of an ethylene chain.…

Place Values of Addition – Expanded Form In our decimal number system, the value of a digit depends on its place, or position, in the…

Thoracic Diaphragm Definition Thoracic diaphragm is the large muscle that separates the chest cavity from the abdominal cavity in mammals and is the principal muscle…

Selenium Definition Selenium is a nonmetallic element that occurs in a gray crystalline form, as a red powder, or as a black glassy material. Its…

Polymorphism Definition Polymorphism in materials science is refers to the ability of a solid material to exist in more than one form or crystal structure.…

Aorta Definition Aorta is the main artery of the circulatory system, arising from the left ventricle of the heart in mammals and birds and carrying…

Properties of Addition There are four mathematical properties which involve addition. The properties are the commutative, associative, additive identity and distributive properties. Commutative property: Changing…

Phosphorus Pentoxide Definition Phosphorus pentoxide is a white odourless solid produced when phosphorus burns: has a strong affinity for water with which it forms phosphoric…

Mitral Valve Definition Mitral valve is a valve of the heart, composed of two triangular flaps, that is located between the left atrium and left…

Vitamin E Definition Vitamin E is a fat-soluble vitamin important for normal cell growth and function. It has at least eight different forms, the most…

Tricresyl Phosphate Definition Tricresyl phosphate (TCP) is a colorless, odorless liquid. Insoluble in water and slightly denser than water. Toxic by ingestion and skin absorption.…