Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The state of being pneumatic, or of having a cavity or cavities filled with air.

from the GNU version of the Collaborative International Dictionary of English

  • n. The state of being pneumatic, or of having a cavity or cavities filled with air.

from The Century Dictionary and Cyclopedia

  • n. The state of being pneumatic, or hollow and filled with air; capacity of being inflated with air; inflation by air: applied to air-passages of animals, the hollow bones of birds, etc.

Etymologies

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