noun Date: circa 1882 a concealed stitch for sewing folded edges (as hems) made by alternately running the needle inside the fold and picking up a thread or two from the body of the article, an unworked stitch
SLIP STITCH
Meaning of SLIP STITCH in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012