en·do·plasm 
(ĕndə-plăz′əm)
(ĕndə-plăz′əm)n.
A central, less viscous portion of the cytoplasm that is distinguishable in certain cells, especially motile cells.
en′do·plasmic adj.
- keep chin up
- keep company
- keep company
- keep down
- keep end up
- keeper
- keep eyes open
- keep eyes peeled
- keep fingers crossed
- keep head
- keep/hold (one's) peace
- keeping
- keep/know (one's) place
- keep kosher
- keep nose clean
- keep nose to the grindstone
- keep off
- keep (one's) chin up
- keep one's chin up
- keep one's end up
- keep one's eyes open
- keep (one's) eyes open/peeled
- keep one's eyes peeled
- keep one's fingers crossed
- keep (one's) head