pipewort Syllabification: (pipe·wort)Pronunciation: /ˈpīpˌwərt, -ˌwôrt/Definition of pipewort noun an aquatic or marsh plant with leafless stems bearing heads of inconspicuous flowers, native to North America and parts of the United Kingdom. Eriocaulon aquaticum, family Eriocaulaceae pipewort in other Oxford dictionaries Definition of pipewort in the British & World English dictionary