| < | less than |
| > | greater than |
| x | times, or duration |
| | | | parallel |
| = | equal to |
| -_ | less, minus, negative |
| ÷ | divided |
| -_ | difference, change |
| 1° | Primary dentition |
| 2° | Permanent (secondary) dentition |
| @ | at |
? Female
? Male
¯ decrease, lower
increase, raise
.
. . therefore
" approximately
Å additional/plus/positive