Fungi imperfecti

from WordNet (r) 3.0 (2006)

Fungi imperfecti
    n 1: large and heterogeneous form division of fungi comprising
         forms for which no sexually reproductive stage is known
         [syn: {Deuteromycota}, {subdivision Deuteromycota},
         {Deuteromycotina}, {Fungi imperfecti}, {subdivision
         Deuteromycotina}]

from The Collaborative International Dictionary of English v.0.48

Fungi Imperfecti \Fun"gi Im`per*fec"ti\, pl. [L. imperfecti
   imperfect.] (Bot.)
   A heterogenous phylum of fungi which lack a sexual phase, or
   of which the sexual phase is not known. Some undoubtedly
   represent the conidium stages of various Ascomycetes. It is
   not considered a natural phylum, and is also called the
   {Deuteromycota}. The group is divided into the orders
   {Sph[ae]ropsidales}, {Melanconiales}, and {Moniliales}. It
   includes the genera {Penicillium} and {Aspergillus}, which
   reproduce asexually by means of conidia.
   [Webster 1913 Suppl. +PJC]