Dictionary.com
definitions

Florentine stitch

noun

See under bargello(def 2).

bargello

[bahr-jel-oh]

noun

a straight stitch worked in a high and low relief pattern to form a variety of zigzag or oblique designs.
needlepoint work or a design done in such stitches, especially the traditional needlepoint created by a classic stitch (Florentine stitch) done in diagonal lines.

Origin of bargello

First recorded in 1920–25; allegedly after a set of chairs embroidered with such a stitch in the Bargello, a museum in Florence
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019