Sē'roŭs, a.

a. [Fr. séreux, Sp. & It. seroso. See SERUM.]

1. Thin; watery; like whey; — said of that part of the blood which separates in coagulation from the grumous or red part; also, of the fluid which lubricates a serous membrane.
2. Pertaining to serum.

Serous membrane. See MEMBRANE.