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| 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. |
| the offspring of a zebra and a donkey. |
| hydroxy acid | |
| —n | |
| 1. | any acid, such as sulphuric acid, containing hydroxyl groups in its molecules |
| 2. | any of a class of carboxylic acids that contain both a hydroxyl group and a carboxyl group in their molecules |