| Serous 1. (a.) Thin; watery; like serum; as the serous fluids. 2. (a.) of or pertaining to serum; as, the serous glands, membranes, layers. See Serum. Thesaurus Entries bloody, chylifactive, chylifactory, chylific, excretory, humoral, ichorous, lachrymal, lachrymose, lacrimatory, lactational, lacteal, lacteous, phlegmy, purulent, pussy, rheumy, salivant, salivary, salivous, sanious, secretional, secretive, secretory, seminal, sialagogic, spermatic, suppurated, suppurating, suppurative, tearlike, watering, watery |