pectinous,a.Chem.|ˈpɛktɪnəs| [f. pectin + -ous.] Of the nature of or related to pectin: = pectinaceous, pectous b. 1844[see pectinaceous].1892Chambers' Encycl. IX. 788/1 The juice of the [beet] root contains..albuminous, pectinous, and other substances.