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The Collaborative International Dictionary
Pectize

Pectize \Pec*tize"\ (p[e^]k*t[imac]z"), v. i. [Gr. phkto`s solid.] To congeal; to change into a gelatinous mass. [R.]
--H. Spencer.

Wiktionary
pectize

vb. To congeal; to change into a gelatinous mass.