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pneu·mat·ic(no͞o-măt′ĭk, nyo͞o-) also pneu·mat·i·cal (-ĭ-kəl)
1. Of or relating to air or other gases.
2. Of or relating to pneumatics.
a. Run by or using compressed air: a pneumatic drill.
b. Filled with air, especially compressed air: a pneumatic tire.
4. Zoology Having cavities filled with air, as the bones of certain birds.
5. Of or relating to the pneuma; spiritual.
[French pneumatique, from Latin pneumaticus, from Greek pneumatikos, from pneuma, pneumat-, wind; see pneu- in Indo-European roots.]
pneu′ma·tic′i·ty (no͞o′mə-tĭs′ĭ-tē, nyo͞o′-) n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Zoology) zoology the condition of being pneumatic
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014