Definition: The word "abscission" in biology refers to the process by which a plant or animal cell divides into two identical daughter cells (orogenes) by dividing its nucleus. In this process, a portion of the cell's nuclear material is released outside of the cell as a substance known as an abscissum. The release of this substance is called abscission because it appears to be falling apart from the cell membrane and gradually forming into smaller fragments that are eventually joined together by the nucleus to form two identical daughter cells. Abscision is often used in biological contexts where there is a need for precise control over the size or shape of a cell. This can occur during differentiation processes, when cells undergo changes in their structure, such as elongation or reduction. In addition, abscission may also be involved in the formation of certain types of cells, such as parthenocysteinoma, which is a type of cancer that affects various organ systems including the immune system.
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