- (a.) Pertaining to, derived from or designating, the highest oxygen acid (HIO/) of iodine.
- (a.) Alternative of Periodical.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). periodic. Retrieved September 27, 2026, from http://smartdefine.org/periodic/definitions/2043862 |
| Chicago | Webster's. 2011. "periodic" http://smartdefine.org/periodic/definitions/2043862 (accessed September 27, 2026). |
| Harvard | Webster's 2011, periodic, Smart Define, viewed 27 September, 2026, <http://smartdefine.org/periodic/definitions/2043862>. |
| MLA | Webster's. "periodic" 27 May 2011. Web. 27 September 2026. <http://smartdefine.org/periodic/definitions/2043862> |