https://doi.org/10.1351/goldbook.O04324
Separated compartments within a cell with specialized functions, e.g. nuclei (containing most of the genetic material), @M03937@ (respiratory energy supply for the cell), chloroplasts (location of @P04655@) etc.
Source:
PAC, 1992, 64, 143. (Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)) on page 162 [Terms] [Paper]