pneu1
/njuː/noun
Palaeontology. A flexible layer in an organism enclosing a pressurized filling.
Origin
Early 20th century (in an earlier sense). Shortened from pneumatic.
pneu2
/njuː/informal
noun
Pneumonia.
Origin
Early 20th century; earliest use found in Anzac Book. Shortened from pneumonia, perhaps after flu.
pneu3
/njuː/informal
noun
= pneumatique.
Origin
1920s; earliest use found in James Joyce (1882–1941), writer. Shortened from pneumatique, after French pneu.
PNEU4
noun
Parents' National Educational Union.
Origin
Early 20th century; earliest use found in Walter Thomas Rogers (d. 1912).