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sub·son·ic
 subsonic
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- pronunciation:
- suhb
sa
nihk
- features:
- Word Combinations (adjective)
| part of speech: |
adjective |
| definition 1: |
below an audible level; infrasonic.
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| definition 2: |
denoting, having, or pertaining to a speed less than that of sound in air.
a subsonic aircraft |
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