Science

Celluloid Definition Celluloid is a flammable thermoplastic material consisting of cellulose nitrate mixed with a plasticizer, usually camphor: used in sheets, rods, and tubes for…

About Emotion Definition Emotion is a complex psychological state that involves three distinct components: a subjective experience, a physiological response, and a behavioral or expressive…

Tricuspid Valve Definition Tricuspid valve is a valve of the heart, usually having three cusps, that is located between the right atrium and right ventricle…

About Nitrate Definition Nitrate is a salt or ester of nitric acid, containing the group NO3. Nitrates dissolve extremely easily in water and are an…

Atrial Flutter Definition Atrial flutter is similar to atrial fibrillation, a common heart rhythm disorder. It is usually associated with a fast heart rate (100…

Sodium Benzoate Definition Sodium benzoate is the sodium salt of benzoic acid, which is often used as a preservative and anticorrosive agent in a variety…

Tellurium Definition Tellurium is a metalloid element that occurs as either a brittle, shiny, silvery-white crystal or a gray or brown powder. It is far…

Cardiac Muscle Definition Cardiac muscle is responsible for pumping blood throughout the body. It is a type of muscle tissue that is found only in…

Identifying Types of Triangles by Angles The triangle is perhaps most common shape ever studied in geometry. It is a kind of polygon which has…

Polonium Definition Polonium is a radioactive metallic element, occurring naturally in small quantities as a product of radium disintegration and produced synthetically by bombarding bismuth…

Heart Atrium Definition Atrium (Heart) is a chamber of the heart that receives blood from the veins and forces it by muscular contraction into a…

About Citric Acid Definition Citric acid is a white, odorless acid that has a sour taste and occurs widely in plants, especially in citrus fruit,…