Title text:
I mean, half of these are undefined. And your multiplication dots are too low; they look like decimal points.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3213/
A dental formula specifies the number of teeth of each type on each side of the jaw for a given species, with dots separating the numbers. There are two rows, representing the upper and lower jaw, separated by a horizontal line. The number of incisors is indicated first, canines second, premolars third, and finally molars