[1790–1800; cheli- + -form]This word is first recorded in the period 1790–1800. Other words that entered Englishat around the same time include: cannibalism, cutout, gelatin, silhouette, stereotype-form is a combining form meaning “having the form of”. Other words that use the affix-form include: cuneiform, iodoform, moniliform, tectiform, terraform