Both root and root cap are covered by a sheath - like structure called the coleorhiza.根和根冠被一鞘 状 结构,即胚根鞘所覆盖.Coleorhiza ( pl . coleorhizae ) The protective sheath surrounding the radicle in grasses.胚根鞘:保护幼根的鞘状结构....

coleorhiza的音标：coleorhiza的英式发音音标为：[ˌkəʊlɪə'raɪzə]coleorhiza的美式发音音标为：[ˌkoʊlɪr'raɪzə]...

n.胚根鞘...