Velum

имя существительное 1) [анатомия] нёбная занавеска 2) [историческое] навес (над амфитеатром в Древнем Риме)

Большой англо-русский словарь

Velum

noun (plural vela) Etymology: New Latin, from Latin, curtain 1. a membrane or membranous part resembling a veil or curtain: as a. soft palate b. an annular membrane projecting inward from the margin of the umbrella in some jellyfishes (as the hydromedusae) 2. a swimming organ that is especially well developed in the later larval stages of many marine gastropods

Merriam-Webster's Collegiate Dictionary