mycoplasm
noun
my·co·plasm
ˈmīkəˌplazəm
variants or less commonly mycoplasma
ˌ⸗⸗ˈplazmə 
: a hypothetical hibernating form of various fungi (as rusts) in which the fungus protoplasm is intimately fused with that of dormant structures (as seeds) of the host plant
Word History
Etymology
New Latin mycoplasma, from myc- + -plasma