1) Family adiantaceae 2) Fern family 
Adiantaceae (as construed here, sensu strictu, not a synonym of Pteridaceae) is a family of ferns in the order Pteridales. This includes the family formerly known as the `Vittariaceae.` Recent genetic analyses based on chloroplast genes demonstrate that the vittarioid ferns cladistically nest within the genus Adiantum, making that genus paraphyl.....
[n] - used in some classification systems for some genera of the family Polypodiaceae (or Pteridaceae)
family Adiantaceae noun used in some classification systems for some genera of the family Polypodiaceae (or Pteridaceae)