| 单词 | pneumatic |
| 释义 | pneumatic adj. & n. --adj 1. of or relating to air or wind. 2. containing or operated by compressed air. 3. connected with or containing air cavities esp. in the bones of birds or in fish. Phrases and idioms pneumatic drill a drill driven by compressed air, for breaking up a hard surface. pneumatic trough a shallow container used in laboratories to collect gases in jars over the surface of water or mercury. Derivatives pneumatically adv. pneumaticity n. Etymology: F pneumatique or L pneumaticus f. Gk pneumatikos f. pneuma wind f. pneo breathe |
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