(a.) Pertaining to or designating, an acid of sulphur obtained by leading hydrogen sulphide into a solution of sulphur dioxide; -- so called because it contains five atoms of sulphur.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). pentathionic. Retrieved September 24, 2026, from http://smartdefine.org/pentathionic/definitions/2043492 |
| Chicago | Webster's. 2011. "pentathionic" http://smartdefine.org/pentathionic/definitions/2043492 (accessed September 24, 2026). |
| Harvard | Webster's 2011, pentathionic, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/pentathionic/definitions/2043492>. |
| MLA | Webster's. "pentathionic" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/pentathionic/definitions/2043492> |