Plast is defined as a small particle of a living matter.
An example of plast is cytoplast, which is a particle of the substance on the outside of a cell's nucleaus of a plant or animal.
a unit of protoplasm: chromoplast
Origin of -plast; from Classical Greek plastos, formed ; from plassein, to form: see plastic
A small body, structure, particle, or granule, especially of living matter; cell: chloroplast.
Origin of -plastFrom Greek plastos, molded, from plassein, to mold; see pel&schwa;-2 in Indo-European roots.