tat·too 2 
(tă-t)
(tă-t)n. pl. tat·toos
1. A permanent mark or design made on the skin by a process of pricking and ingraining an indelible pigment or by raising scars.
2. A design made on the skin with a temporary dye such as henna or ink.
tr.v. tat·tooed, tat·too·ing, tat·toos
1. To mark (the skin) with a tattoo.
2. To form (a tattoo) on the skin.
[From Tahitian tatau and kindred Polynesian words, all from Proto-Polynesian *tatau.]
tat·tooer n.
tat·tooist n.