nonsedimentable
adjective
non·sed·i·ment·able ˌnän-ˌse-də-ˈmen-tə-bəl 
: not capable of having a sediment separated out (as by centrifugation) : not sedimentable
nonsedimentable proteins
Word History
First Known Use
1919, in the meaning defined above
Medical Definition
nonsedimentable
adjective
non·sed·i·ment·able ˌnän-ˌsed-ə-ˈment-ə-bəl
: not capable of being sedimented under specified conditions (as of centrifugation)
nonsedimentable RNA