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The word tattoo, or tattow in the 18th century, is a loanword from the Samoan word tatau, which means "to strike". The Oxford English Dictionary gives the etymology of tattoo as "In 18th c. tattaow, tattow. From Polynesian (Samoan, Tahitian, Tongan, and so on.) tatau. In Marquesan, tatu." Ahead of the importation of the Polynesian word, the practice of tattooing had been described in the West as painting, scarring or staining.The etymology of the physique modification term is not to be confused with the origins of the word for the military drumbeat or functionality — see military tattoo. In this case, the English word tattoo is derived from the Dutch word taptoe.The first written reference to the word tattoo (or tatau) seems in the journal of Joseph Banks (24 February 1743 – 19 June 1820), the naturalist aboard explorer James Cook's ship HMS Endeavour: "I shall now mention the way they mark themselves indelibly, every of them is so marked by their humour or disposition".[5] The word tattoo was brought to Europe by Cook, when he returned in 1769 from his very first voyage to Tahiti and New Zealand. In his narrative of the voyage, he refers to an operation called "tattaw".

Tattoo enthusiasts could refer to tattoos as "ink", "pieces", "skin art", "tattoo art", "tats" or "work"; to the creators as "tattoo artists", "tattooers" or "tattooists"; and to areas where they operate as "tattoo shops", "tattoo studios" or "tattoo parlors".Mainstream art galleries hold exhibitions of each conventional and custom tattoo styles, such as Beyond Skin, at the Museum of Croydon. Copyrighted tattoo designs that are mass-made and sent to tattoo artists are known as "flash", a notable instance of industrial design.[8] Flash sheets are prominently displayed in a lot of tattoo parlors for the goal of delivering each inspiration and ready-created tattoo images to consumers.

The Japanese word irezumi indicates "insertion of ink" and can imply tattoos using tebori, the traditional Japanese hand approach, a Western-style machine or any approach of tattooing employing insertion of ink. The most common word employed for standard Japanese tattoo designs is horimono. Japanese might use the word tattoo to imply non-Japanese types of tattooing.