A zigzag is a pattern made up of small corners at variable angles, though constant within the zigzag, tracing a path between two parallel lines; it can be described as both jagged and fairly regular.
^Liberman, Anatoly (2009). Word Origins...And How We Know Them: Etymology for Everyone. Oxford University Press, USA. ISBN978-0-19-538707-0.
^Shepler, Missy; Brent, Rebecca (2011). The Complete Idiot's Guide to Sewing. Penguin. p. 84. ISBN978-1-101-51368-2.
^Gardiner, Wendy; Knight, Lorna (2011). The Sewing Machine Accessory Bible: Get the Most Out of Your Machine---From Using Basic Feet to Mastering Specialty Feet. Macmillan. pp. 34–35. ISBN978-0-312-67658-2.
^Allen, Terry (1986). "4". A Classical Revival in Islamic Architecture. Wiesbaden.{{cite book}}: CS1 maint: location missing publisher (link)