Pro"to*plasm(?), n. [Proto- + Gr. form, fr. to mold.] (Biol.) The viscid and more or less granular material of vegetable and animal cells, possessed of vital properties by which the processes of nutrition, secretion, and growth go forward; the so-called " physical basis of life;" the original cell substance, cytoplasm, cytoblastema, bioplasm sarcode, etc.
The lowest forms of animal and vegetable life (unicellular organisms) consist of simple or unaltered protoplasm; the tissues of the higher organisms, of differentiated protoplasm.
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