phylum
phy.lum \'fi--l*m\ \-l*\ n or phy.la [NL, fr. Gk phylon tribe, race - more at PHYL-] pl 1a: a direct line of descent within a group 1b: a group that constitutes or has the unity of such a phylum; esp :: one of the usu. primary divisions of the animal kingdom {the ~ Arthropoda} 2: a group of languages related more remotely than those of a family or sto ck