psorosperm
/ˈsɔːrə(ʊ)ˌspəːm/Biology and Medicine. Now historical
noun
Any of various unicellular parasites found in an encysted stage in the tissues of a host; (also) any of the organisms which form such cysts, now variously identified as sporozoans (especially coccidia and gregarines), microsporidians, and myxosporidians.
Origin
Mid 19th century. From German Psorosperm from ancient Greek ψώρα + σπέρμα seed.