a. [ Cf. F. séreux. See Serum. ] (Physiol.) (a) Thin; watery; like serum; as, the serous fluids. (b) Of or pertaining to serum; as, the serous glands, membranes, layers. See Serum. [ 1913 Webster ]
Serous membrane. (Anat.) See under Membrane. [ 1913 Webster ]