“A general term for seed that is healthy (free of disease, [or under a predefined threshold]) and from which inert matter (dirt, sand, and twigs) has been removed [in the case of grains].”

References

Sperling, Louise. 2008. When Disaster Strikes: A Guide to Assessing Seed System Security. CIAT Publication. Cali, Colombia: CIAT. http://ciat-library.ciat.cgiar.org/Articulos_CIAT/sssa_manual_ciat.pdf