Meso*my*ce"tous

from The Collaborative International Dictionary of English v.0.48

Mesomycetes \Mes`o*my*ce"tes\, n. pl. [NL.; meso- + mycetes.]
   (Bot.)
   One of the three classes into which the fungi are divided in
   Brefeld's classification. -- {Mes`o*my*ce"tous}, a.
   [Webster 1913 Suppl.]