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Polyphosphate Definition Polyphosphate is a type of salt or ester of polymeric oxyanion formed from tetrahedral PO4 (phosphate) structural units connected together by sharing oxygen…

Aluminium Definition Aluminium is a silvery-white, ductile metallic element, the most abundant in the earth’s crust but found only in combination, chiefly in bauxite. Aluminium…

Capillary Definition Capillary is any of the tiny blood vessels that connect the smallest arteries (arterioles) to the smallest veins (venules). Capillaries form a network…

About Bronze Definition Bronze is a yellow or brown alloy of copper and tin, sometimes with small amounts of other metals such as lead or…

Calculating the Area of a Rectangle A rectangle is a four-sided plane figure, or any quadrilateral, with four right angles. Opposite sides of a rectangle…

Pyrophosphate Definition Pyrophosphate is a salt or ester of pyrophosphoric acid, containing the group P2O7. In chemistry, a pyrophosphate is a phosphorus oxyanion. The group…

Antiseptic Definition Antiseptic is a substance that inhibits the proliferation of infectious agents. It is a product which eradicates or prevents the development of bacteria…

About Artery Definition Artery is any of the blood vessels that carry oxygenated blood away from the heart to the body’s cells, tissues, and organs.…

Sodium Bicarbonate Definition Sodium bicarbonate is a white crystalline compound used in beverages and as a leavening agent to make baked goods. In medicine, sodium…

Ceramic Definition Ceramic are any of various hard, brittle, heat- and corrosion-resistant materials made typically of metallic elements combined with oxygen or with carbon, nitrogen,…

Retina Definition Retina is the light-sensitive membrane that lines the inside of the back of the eyeball and connects to the brain by the optic…

Malachite Definition Malachite is a bright-green monoclinic mineral occurring as a mass of crystals (an aggregate) with smooth or botryoidal (grape-shaped) surfaces. It is often…