Word of the day

The word for today is…

pneumatic (adj) – 1. Of or relating to air or other gases.
2. Of or relating to pneumatics.
3. (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.

Source : The Free Dictionary

Etymology : The Latin adjective pneumaticus ?pertaining to air or wind? refers only to machines or devices powered or driven by wind. The Greek original, pneumatik?s, has many other meanings not in Latin, e.g., (as a neuter noun) a subtle substance or being; (of wine or food) causing flatulence or wind; breath, breathing, exhalation, and respiration; pertaining to the spirit or spirits, spiritual.

Modern usage goes far beyond the Greek: practical pneumatic tires for bicycles (which maintain their shape by compressed air) were made toward the end of the 19th century. And the English man of letters Aldous Huxley (1894?1963) used pneumatic in his novel Brave New World (1932) in the sense of ?bosomy, busty,? a sense that he likely invented. Pneumatic entered English in the 17th century.