abioseston
noun
abio·ses·ton ¦ā-ˌbī-ō-¦se-ˌstän 
ecology
: the nonliving constituents of seston : tripton
Since many organisms discriminate between particles only on the basis of size, they may also ingest considerable quantities of suspended inorganic particles, or abioseston. 
J. H. R. Gee, in Fundamentals of Aquatic Ecology, 1991
compare bioseston J. H. R. Gee, in Fundamentals of Aquatic Ecology, 1991
Word History
Etymology
borrowed from German Abioseston, from a- a- entry 2 + bio- bio- + Seston seston
First Known Use
1963, in the meaning defined above