post-office order
now rare
noun
A money order for a specified sum issued upon payment at one post office, and payable at another (named) post office to the person specified in a letter of advice.
Origin
Early 19th century; earliest use found in Walter Scott (1771–1832), poet and novelist.
- relative error
- relative humidity
- relatively
- relatively prime
- relative molecular mass
- relativeness
- relative permeability
- relative permittivity
- relative pitch
- relative pressure
- relative pronoun
- relative proper motion
- relative sexuality
- relative superlative
- relative to
- relativise
- relativiser
- relativism
- relativist
- relativistic
- relativistically
- relativity
- relativization
- relativize
- relativizer