/kawr tuy"neuh, -tee"neuh/ , n. , pl. cortinae /-tuy"nee, -tee"nuy/ . Mycol.
a weblike, often evanescent veil covering the gills or hanging from the cap edge of certain mushrooms, particularly those of genus Cortinarius, and sometimes persisting as a ring or remnant of fibrils around the mushroom stalk.
[ 1825-35; cortina CURTAIN ]