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sero-serous
sero-serous adj.
Brit. 
/ˌsɪərəʊˈsɪərəs/
, /ˌsɪərəʊˈsɪərəs/U.S. /ˌsɪroʊˈsɪrəs/
pertaining to two or more serous membranes jointly./ˌsɪroʊˈsɪrəs/ΚΠ
1894 Foster's Med. Dict. Sero-serous, pertaining to two or more serous membranes jointly.
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