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Flare Star Definition Flare Star is a variable star that sporadically displays sudden increases in brightness, sometimes becoming six times as bright in a matter…

Nuclear Membrane Definition Nuclear Membrane is the double-layered membrane of the cell nucleus, separating the nucleoplasm from the cytoplasm and permeable to certain molecules, esp.…

Nuclear Pore Definition Nuclear Pore is a group of proteins with a central hole through which molecules pass through a nuclear membrane. It is any…

Geomagnetic Storm Definition Geomagnetic storm is a disturbance in the magnetosphere due to near-Earth space weather that happens when the interplanetary magnetic field turns southward…

Centrosome Definition Centrosome is a specialized region of the cytoplasm that is located next to the nucleus of a cell and contains the centrioles. The…

Histone Definition Histone is one of a number of simple proteins (often found in the cell nucleus) containing a high proportion of basic amino acids,…

Solar Flare Definition Solar Flare occurs when magnetic energy that has built up in the solar atmosphere is suddenly released. On the Sun’s surface are…

About Lysosome Definition Lysosome is a cell organelle, which is surrounded by a membrane; it has an acidic interior, and contains hydrolytic enzymes that break…

Aurora Definition Aurora is a luminous phenomenon that consists of streamers or arches of light appearing in the upper atmosphere of a planet’s magnetic Polar…

About Chromosome Definition Chromosome is a single chain of DNA that is coiled and super coiled to form dense thread-like pieces. The term chromosome is…

Golgi apparatus Definition The Golgi apparatus is like the post office or shipping and receiving department of a cell. It is a cellular organelle that…

Cell Nucleus Definition Cell Nucleus is the most noticeable organelle within a eukaryotic cell, and perhaps the most important and defining feature of the eukaryotic…