Definition of infraclass in English:
 infraclass
nounˈɪnfrəklɑːsˈinfrəˌklas
Biology A taxonomic category that ranks below a subclass.
 Example sentencesExamples
-  We performed phylogenetic analyses of introns from species from four avian orders that are representative of the two infraclasses within Aves.
 -  Names of infraclasses and cohorts within Neornithes are shown.
 -  The taxonomic rationale for placement at the infraclass level is discussed in Brower.
 -  In all cases, a representative of the mammalian infraclass Metatheria was designated as an outgroup.
 -  I'm animal, my phylum is chordata, my subphylum is vertebrate, my class is mammals, sublass theria, infraclass eutheria, within that I'm a primate, and within that I'm human.