柯林斯词典velum /ˈviːləm/ 1. N any of various membranous structures, such as the ciliated oral membrane of certain mollusc larvae or the veil-like membrane running around the rim of a jellyfish 软口盖[zoology] 返回 velum剑桥词典the soft area at the top in the mouth 软腭 返回 velum