Term Name:	organelle lumen
Synonyms:
Definition:	The internal volume enclosed by the membranes of a particular organelle; includes the volume enclosed by a single organelle membrane, e.g. endoplasmic reticulum lumen, or the volume enclosed by the innermost of the two lipid bilayers of an organelle envelope, e.g. nuclear lumen.
Ontology:	GO: Cellular Component [GO:0043233]    QuickGO    AmiGO