phylum
/ˈfaɪləm; `faɪləm/ n
(pl -la / -lə; -lə/) (biology 生) major division in the animal or plant kingdom （动物或植物分类上的）门
The mollusc phylum includes all soft-bodied animals without backbones. 软体动物门包括所有无脊椎的软体动物. Cf 参看 class 7, order1 9, family 4, genus 1, species 1.