ergastic
adjective
er·gas·tic (ˌ)ər-ˈga-stik 
: constituting the nonliving by-products of protoplasmic activity
ergastic substances
Word History
Etymology
Greek ergastikos able to work, from ergazesthai to work, from ergon work
First Known Use
circa 1896, in the meaning defined above
Medical Definition
ergastic
adjective
er·gas·tic (ˌ)ər-ˈgas-tik
: constituting the nonliving by-products (as intracellular deposits of starch or fat) of protoplasmic activity