| Edition | As printed | Type | Chars | Location | vs. previous |
|---|
| 1st ed. (1771) | ISCHIUM | cross-reference | 38 | vol. 2, p. 850 | |
| 2nd ed. (1778–83) | ① ISCHIUM | article | 72 | vol. 5, p. 3955 | |
| 3rd ed. (1797) | ② ISCHIUM | article | 72 | vol. 9, p. 357 | |
| 5th ed. (1815) | ③ ISCHIUM | article | 72 | vol. 11, p. 359 | |
| 6th ed. (1823) | ④ ISCHIUM | article | 73 | vol. 11, p. 359 | |