柯林斯詞典velum /?vi?l?m/ 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 軟口蓋[zoology] 返回 velum劍橋詞典the soft area at the top in the mouth 軟齶 返回 velum