Yes, that is correct. The singular of dice—a plural noun referring to the small cubes used in games of chance—is die.
Because the irregular plural is more common than the singular, many writers forget to use the singular at all.
If dice is treated as singular often enough, we may simply have to accept that the word has changed. But, for now, careful writers still keep dice and die separate.
In a blog post written by Jonathon Owen called 'No Dice', he explained:
Originally, die was a regular noun that formed its plural by adding an s sound to the end. At some point in the history of English, the final -s in plurals was voiceless, meaning that it was always pronounced with an s sound, not a z sound. But then that changed, probably sometime in the 1500s, so that the final -s was always voiced—that is, pronounced as a z—unless it followed a voiceless sound. Strangely, this sound change seems to have affected only the plural and possessive -s endings and not other word-final s’s.
But around that time, we start seeing the plural of die, when referring to those little cubes with pips used for games and whatnot, spelled as dice (and similar forms). In Modern English spelling, the final -s on a plural can be either voiced or voiceless, depending on the preceding word, but -ce is always voiceless. As the regular plural ending was becoming voiced for many many words, it remained voiceless in dice. Why?
Well, apparently because people had stopped thinking of it as a plural and started thinking of it as a mass noun, much like corn and rice, so they stopped seeing the s sound on the end as the plural marker and started perceiving it as simply part of the word. Singular dice can be found back to the late 1300s, and when the sound change came along in the 1500s and voiced most plural -s endings, dice was left behind, with its spelling altered to show that it was unequivocally voiceless. In other senses of the word, die was still thought of as a regular count noun, so its plural forms ended up as dies.
Check out 39 plural forms that might confuse writers from Prdaily.com.