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| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| 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. |
mineral (mĭn'ər-əl) Pronunciation Key
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In the diet, certain substances necessary for the maintenance of life and good health. Some are essential components of bodily substances, such as the calcium in bones and the iron in hemoglobin, whereas others help regulate the activities of metabolism. (See under “Earth Sciences.”)