| 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. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
hypochlorous acid hy·po·chlo·rous acid (hī'pə-klôr'əs)
n.
A weak but strongly oxidizing acid produced by the reaction of chlorine and water and used as a bleaching agent, disinfectant, and chlorinating agent.
| hypochlorous acid (hī'pə-klôr'əs) Pronunciation Key
A weak, unstable acid occurring only in solution and used as a bleach, oxidizer, deodorant, and disinfectant. Chemical formula: HOCl. |