offshoot

offshoot
/ˈɔfʃu:t; ?@ ˈɔ:f-; `ɔfˌʃut/ n
stem or branch growing from a main stem 枝子; 枝条; 枝杈
    remove offshoots from a plant 修剪植物的枝桠
    (fig 比喻) the offshoot of a wealthy family 富家的旁系.

牛津英汉双解词典