[1840–50; digiti- + -form]This word is first recorded in the period 1840–50. Other words that entered Englishat around the same time include: bypass, colloid, plaque, set piece, striationdigiti- is a combining form meaning “finger,” used in the formation of compound words. Otherwords that use the affix digiti- include: digitinervate, digitipinnate; -form is a combining form meaning “having the form of”. Other words that use the affix-form include: arcform, iodoform, moniliform, somatoform, villiform