pectic \pec"tic\ (p[e^]k"t[i^]k), a. [Gr. phkto`s curdled.]
(Chem.)
Of or pertaining to pectin; specifically, designating an acid
obtained from ordinary vegetable jelly (pectin) as an
amorphous substance, tough and horny when dry, but gelatinous
when moist.
[1913 Webster]