1) Taxon 2) Taxonomic category 3) Taxonomic group 
• (n.) One of the subdivisions, of more importance than genus, into which certain families are divided.
(sub´fam″ĭ-le) a taxonomic division sometimes established, subordinate to a family and superior to a tribe or genus.
Taxonomic designation within the family rank, below family.
Sub·fam'i·ly noun (Biol.) One of the subdivisions, of more importance than genus, into which certain families are divided. 
Type: Term Pronunciation: sŭb-fam′i-lē Definitions: 1. In biologic classification, a division between family and tribe or between family and genus.
subset of a family, wtih one or more genera.
[n] - (biology) a taxonomic category below a family
noun (biology) a taxonomic category below a family
a taxonomic rank between family and tribe
a category of related genera within a family. · (in the classification of related languages within a family) a category of a higher order than a branch. Cf.(def. 8),(def. 14).