Greek: βαπτισμος [baptismos] (Noun masculine). A washing. Ablution.

βαπτισμος [baptismos] appears 5 times in the NT:

(1) Mark 7: 4
And when they come from the market, except they wash, they eat not. And many other things there be, which they have received to hold, [as] the washing of cups, and pots, brasen vessels, and of tables. - βαπτισμους [baptismous] Accus. pl.

(2) Mark 7: 8
For laying aside the commandment of God, ye hold the tradition of men, [as] the washing of pots and cups: and many other such like things ye do. - βαπτισμους [baptismous] Accus. pl.

(3) Colossians 2: 12
Buried with him in baptism, wherein also ye are risen with him through the faith of the operation of God, who hath raised him from the dead. - τω βαπτισμω [tô baptismo] Dat. sing. / Variant: βαπτισμα [baptisma] .

(4) Hebrews 6: 2
Of the doctrine of baptisms, and of laying on of hands, and of resurrection of the dead, and of eternal judgment. - βαπτισμων [baptismôn] Gen. pl.

(5) Hebrews 9: 10
Which stood only in meats and drinks, and divers washings, and carnal ordinances, imposed on them until the time of reformation. - βαπτισμοις [baptismois] Dat. pl.