olemus
(a) kunstis
dekoratiivmuster arhitektuuris ja tarbekunstis,
koosneb põimuvatest joontest, mis moodustavad kujundeid
Merriam-Webster:
1: an architectural ornament formed of two or more interlaced bands with openings containing round devices
2: a pattern (as on metalwork) made by interlacing curved lines

http://3.bp.blogspot.com/_zJpnTu57Koc/TDftHV3k-II/AAAAAAAAUnQ/JjXGX45tqnw/s1600/LI-archi-guilloch-001b.jpg

https://duckduckgo.com/?q=guilloche&t=h_&iax=images&ia=images

https://en.wikipedia.org/wiki/Guilloch%C3%A9

(b) dokumenditurbes
sellisel mustril põhinev joonevõrk
rahatähtedel, väärtpaberitel jm
= anti-counterfeit design element
using interwoven patterns of fine lines

http://static3.depositphotos.com/1001655/150/v/950/depositphotos_1507642-Guilloche-rosette-vector.jpg

http://artlandia.com/products/SymmetryWorks/imgs/Guilloche.jpg

https://ijiset.com/vol3/v3s10/IJISET_V3_I10_45.pdf