If something is reticulated, it is covered with a pattern of lines that cross and make little squares or holes, like a net. You see it on a giraffe’s coat, on some leaves, on old windows with lead lines, on a map of roads. It is a careful, slightly technical word. Scientists and designers use it more than everyday speakers, who might just say “net-like” or “a grid.” Though actually, it does not mean “on the internet” or “linked in a network.” It is about the look of a net, not about computers.