Microseismometer
Mi`cro*seis*mom"e*ter\, n. [Microseism + -meter.] A seismometer for measuring amplitudes or periods, or both, of microseisms. -- Mi`cro*seis*mom"e*try, n.| 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. |
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