1) Acid 1) Cellulose 2) Type of acid 3) Type of acid or enzyme 
• (a.) 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.
Pec'tic adjective [ Greek ... curdled.] (Chemistry) 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. 
Type: Term Pronunciation: pek′tik Definitions: 1. Relating to any of the substances or materials referred to as pectin.
[adj] - of or relating to or derived from pectin
adjective of or relating to or derived from pectin; `pectic acid`