Ookinete (oo- + Greek kinetos motile) is the ability of some single-celled organisms, such as amoebas, to move by extending pseudopodia.
Pseudopodia are temporary outgrowths of the cell cytoplasm that can extend in any direction. With the help of pseudopodia, the amoeba can crawl, catch prey, or attach to the substrate. When the amoeba moves, it extends pseudopodia in the direction of movement, and then flows cytoplasm into them. In this case, the pseudopodia are retracted back into the cell from behind.
Thus, thanks to the ability to ookinete, amoebas and other single-celled organisms can actively move and search for food in the environment. This is an important feature that allows them to survive as independent organisms.