pneumatic

Etymology

From Latin pneumaticus, from Ancient Greek πνευματικός (pneumatikós, “relating to wind or air”), from πνεῦμα (pneûma, “wind, air, breath, spirit”), from πνέω (pnéō, “I blow, breath”).

adj

1. Of, relating to, or resembling air or other gases
2. Of or relating to pneumatics
3. Powered by, or filled with, compressed air
   a pneumatic instrument or engine
4. (zoology) Having cavities filled with air
   pneumatic cells or bones
5. Spiritual; of or relating to the pneuma
6. (of a woman) well-rounded; full-breasted; bouncy

noun

1. (dated) A vehicle, such as a bicycle, whose wheels are fitted with pneumatic tyres.
2. (Gnosticism) In the gnostic theologian Valentinus' triadic grouping of man, the highest type; a person focused on spiritual reality (the other two being hylic and psychic).