| oxidizing agent | |
| —n | |
| chem Compare reducing agent a substance that oxidizes another substance, being itself reduced in the process. Common oxidizing agents are oxygen, hydrogen peroxide, and ferric salts | |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |