n.(biology) a taxonomic category below a class and above an order

Subclasses of external adenosine receptors
Pirenzepine distinguishes between different subclasses of muscarinic receptors
CD8α+ and CD8α− Subclasses of Dendritic Cells Direct the Development of Distinct T Helper Cells In Vivo
Phylogenetic Oligodeoxynucleotide Probes for the Major Subclasses of Proteobacteria: Problems and Solutions
Integrative Transcriptome Analysis Reveals Common Molecular Subclasses of Human Hepatocellular Carcinoma
Integrated genetic and epigenetic analysis identifies three different subclasses of colon cancer
Functional subclasses of T-lymphocytes bearing different Ly antigens. I. The generation of functionally distinct T-cell subclasses i...
Eph receptors and ligands comprise two major specificity subclasses and are reciprocally compartmentalized during embryogenesis.
Characterization of variant subclasses of cell lines derived from small cell lung cancer having distinctive biochemical, morphologic...
Integrative annotation of human large intergenic noncoding RNAs reveals global properties and specific subclasses