Reseau

Webster's Dictionary of the English Language

·add. ·noun A network;.

II. Reseau ·add. ·noun In lace, a ground or foundation of regular meshes, like network.

III. Reseau ·add. ·noun A system of lines forming small squares of standard size, which is photographed, by a separate exposure, on the same plate with star images to facilitate measurements, detect changes of the film, ·etc.