A sac surrounding the generative bodies in the gonophore of a hydroid.
perianth
In mosses, the involucral bracts of a male flower.
a delicate membrane found on certain protists
a veil-like membrane of immature mushrooms extending from the margin of the cap to the stem and is torn by growth, to reveal the gills
a locomotory and feeding organ provided with cilia found in the larval stage of bivalves
a thin membrane partially covering the cluster of sporangia near the leaf base in quillworts and their extinct relatives
the soft palate
a annular membrane, typically bordering a cavity, especially in certain molluscs, medusae, and other invertebrates
an accessory cloud resembling a veil extending over a large distance; normally associated with cumulus and cumulonimbus