1840 Penny Cycl. XVI. 363/1Many naturalists appear to be satisfied that these *mucoso-calcareous bodies..are not of animal origin. 
1848 Lindley Introd. Bot. i. i. §8 (ed. 4) I. 147[ tr. Mohl inAnn. desSci. Ser. ii. XIII. 223] The *mucosogranular mass continually increases in the interior wall of these cells. 
1856 Mayne Expos. Lex. ,Muco-Purulent, *Mucoso-Purulent. 
1847–54 Webster, *Mucoso-saccharine, partaking of the qualities of mucilage and sugar. 
1891 Syd. Soc. Lex. ,Mucoso-saccharine. 
mucoso-
combining form 
Etymology: Latin mucosus mucous 
 : mucous and 
< mucosopurulent >
< mucososaccharine >
< mucosopurulent >
< mucososaccharine >