undulating membrane

un·du·lat·ing membrane

noun \ˈən-jə-ˌlāt-iŋ-, ˈən-d(y)ə-\


: a vibratile cytoplasmic membrane: a : a lateral expansion of the plasma membrane in some flagellates that is usually associated with a flagellum b : a row of laterally fused long cilia associated in many ciliates with the oral structures

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