dom·i·no 2 
(dŏmə-nō′)
(dŏmə-nō′)n. pl. dom·i·noes or dom·i·nos
1.
a. A costume consisting of a hooded robe worn with an eye mask at a masquerade.
b. The mask so worn.
2. One wearing this costume.
[French, probably from Latin (benedīcāmus) dominō, (let us praise) the Lord, dative of dominus, lord; see dem- in the Appendix of Indo-European roots.]