单词	rostellum
释义	rostellum noun ros·​tel·​lum rä-ˈste-ləm  plural rostella rä-ˈste-lə  : a small process resembling a beak : a diminutive rostrum: such as a : an extension of the stigma of an orchid flower b : an anterior prolongation of the head of a tapeworm bearing hooks rostellar rä-ˈste-lər  adjective Example Sentences Recent Examples on the Web One of the traits researchers are keenest to explore is one that would eliminate a flap inside the vanilla flowers called the rostellum. Alex Fox, Smithsonian Magazine, 23 Dec. 2020 Word History Etymology New Latin, from Latin, diminutive of rostrum beak First Known Use 1686, in the meaning defined above Medical Definition rostellum noun ros·​tel·​lum rä-ˈstel-əm  : an anterior prolongation of the head of a tapeworm often bearing hooks
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