/si roh"seuh, -zeuh/ , n. , pl. serosas, serosae /-see, -zee/ .
1. Embryol. , Zool.
a. the chorion.
b. a similar membrane in insects and other lower invertebrates.
2. See serous membrane .
[ 1885-90; serosa, fem. of serosus, equiv. to L ser ( um ) SERUM + -osus -OSE 1 ]