▪ I.stigmatPhotogr.|ˈstɪgmæt| [? back-formation from stigmatic a.] A stigmatic lens or combination of lenses: see stigmatic A. 9. 1901Photo-miniature Sept. 245 (Cent., Suppl.) ‘Single’ lenses, such as the elements forming Gray's Double Stigmat. ▪ II.stigmat variant of stigmate.