Serous
/ˈsɪə.rəs/noun
Relating to or containing serum, a clear watery bodily fluid.
Did you know?In Latin, *serum* meant the watery part that separates out, and English kept the idea in medical terms for fluids that are clear, thin, and serum-like.
Etymological Timeline
Proto-Indo-European
PIE
*ser-
“to flow, drip, or ooze”
Latin
Latin
serum
“whey; the watery part of milk”
Late Latin
Latin
serosus
“full of serum; watery”
Middle English
English
serous
“watery, like serum”
Modern English
English
serous
“relating to or containing serum”