| 1. | mutilated. |
| 2. | mutual. |
noun, plural ems, adjective | 1. | the letter M, m. |
| 2. | Also called mut, mutton. Printing.
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| 3. | em pica. |
| 4. | Printing. having the area of an em quad or the length of an em dash. |

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em
[ɛm] and emm
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EM abbr.
electron microscope