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Convex polygon is a polygon that has all interior angles less than 180°. Convex polygons are polygons for which a line segment joining any two…

About Sapphire Definition Sapphire is a clear, fairly pure form of the mineral corundum that is usually blue but may be any color except red.…

Radio Telescope Definition Radio Telescope is an instrument that consists of a radio receiver and antenna system mounted on a wide, bowl-shaped reflector, used to…

Limbic System Definition Limbic System is a group of interconnected structures of the brain including the hypothalamus, amydala, and hippocampus that are located beneath the…

About Radio Frequency Definition Radio Frequency (RF) is a frequency or band of frequencies that lie in the range 10 kilohertz to 300 000 megahertz…

Aluminium Oxide Definition Aluminium oxide is a white or colourless insoluble powder occurring naturally as corundum and used in the production of aluminium and its…

Anterior Pituitary Definition Anterior pituitary is a gland at the base of the brain in vertebrate animals that is divided into two regions, anterior and…

Zinc Oxide Definition Zinc oxide is a white powder, ZnO, which used as a pigment and in cosmetics, dental cement, matches, printing inks, and glass,…

About Radio Astronomy Definition Radio astronomy is the study of celestial objects by measurement of the radio waves they emit. It has enabled the detection…

Hyperprolactinemia Definition Hyperprolactinemia (or Hyperprolactinaemia) is elevated levels of prolactin in the blood; which is a normal physiologic reaction during lactation, but pathologic otherwise; often…

Ionic Compound Definition Ionic compound is a compound formed by ions bonding together through electrostatic forces. Ionic compounds are also known as electrically neutral compounds:…

Sella Turcica Definition Sella Turcica is a bony cavity housing the pituitary gland, which is located in the brain and responsible for secreting a number…