The crossword solution for the term 'prefix with -plasmic' is 'ecto'. The prefix 'ecto-' is derived from the Greek word 'ektos', meaning 'OUTSIDE'. It is commonly used in scientific terms to refer to something that is located OUTSIDE of a cell or organism, such as ectoplasm. In biology, ectoplasmic refers to the outermost layer of a cell, which is composed of a thin layer of cytoplasm and the cell membrane.