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plasmagel The specialized outer gel-like cytoplasm of living cells (such as Amoeba) that move by extruding part of the cell (known as a pseudopodium) in the direction of motion. A reversible conversion of plasmagel to the more fluid plasmasol is involved in the continuous flow forward of cytoplasm necessary for forming a pseudopodium (see amoeboid movement). See also cytoplasmic streaming.