Definition: 'Actinoida' is a Greek word that refers to a group of 3 extinct phylla of Actinopteri, which include the Actinus and Actinos.
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Definition: 'Actinoida' is a Greek word that refers to a group of 3 extinct phylla of Actinopteri, which include the Actinus and Actinos.
Definition: The term "actinoida" is a term in biology that refers to a type of protein found within certain types of cells. In this context, it is used to describe the structure and function of certain types of cells or tissues, such as muscle cells, which are responsible for contracting muscles during physical activity. Actinoids are characterized by their ability to form filaments, which are continuous structures that can be seen in the cell membrane and help to stabilize the cell's shape and movement.