A small sharp antipersonnel projectile, used as shrapnel, fired from a shotgun, or scattered from an aircraft.
(dated, uncountable) The game of lawn darts.
Example: 1907, Country-side: A Wildlife Magazine, v. 5 (1907), p. 26. British Empire Naturalist's Association.
The Game of Flechette can be confidently recommended to amuse the seniors at a garden party