The Collaborative International Dictionary of English v.0.48:

Pectosic \Pec*to"sic\ (p[e^]k*t[=o]"s[i^]k), a. (Chem.)
   Of, pertaining to, resembling, or derived from, pectose;
   specifically, designating an acid supposed to constitute
   largely ordinary pectin or vegetable jelly.
   [1913 Webster]