Vine's Expository Dictionary: View Entry
μέλαν mélan, mel'-an; neuter of G3189 as noun; ink:—ink.
The KJV translates Strong's G3188 in the following manner: ink (3x).
ink
Strong's Number G3188 matches the Greek μέλαν (melan), which occurs 3 times in 3 verses in the TR Greek.
View OT results in the LXX Greek concordance
View NT results in the MGNT Greek concordance
2Co 3:3
2Jo 1:12
3Jo 1:13