What is "cortinae"

cortina \cor*ti"na\ (k[^o]r*t[imac]"n[.a] or k[^o]r*t[=e]"n[.a]), n.; pl. cortinae (k[^o]r*t[=e]"n[=e]). (Biology) a cobwebby remnant of the partial veil which in some mature mushrooms hang from the edges of the cap.

See cortina

1. n. a cobwebby partial veil consisting of silky fibrils

2. [also: cortinae (pl)]