| Main Entry: | abyssal plain |
| Part of Speech: | n |
| Definition: | a large area of extremely flat or gently sloping ocean floor just offshore from a continent, at depths of 13,000-20,000 feet |
| Example: | The abyssal plains begin where the continental margins end. Several species of worms, shrimp, brittle stars, sea cucumbers, and fish live in abyssal plains. |
| Usage: | geography |
| a fool or simpleton; ninny. |
| 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. |
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