[1810–20; seti- + -form]This word is first recorded in the period 1810–20. Other words that entered Englishat around the same time include: dynamic, keyboard, liberalism, rationalize, techniqueseti- is a combining form meaning “bristle”; used in the formation of compound words. Otherwords that use the affix seti- include: setireme; -form is a combining form meaning “having the form of”. Other words that use the affix-form include: cuneiform, iodoform, moniliform, somatoform, tectiform