dogstail Syllabification: (dogs·tail)Pronunciation: /ˈdôgzˌtāl/ (also dog's-tail)Definition of dogstail noun an Old World fodder grass with spiky flower heads. Genus Cynosurus, family Gramineae: several species, in particular crested dogstail (C. cristatus), a common pasture grass dogstail in other Oxford dictionaries Definition of dogstail in the British & World English dictionary