per diem

 
Pronunciation: /pəː ˈdiːɛm, ˈdʌɪɛm/

adverb & adjective

  • for each day (used in financial contexts): [as adverb]: he agreed to pay at certain specified rates per diem [as adjective]: they are now demanding a per diem rate

noun

  • an allowance or payment made for each day: per diems are still allowed for out-of-state legislators

Origin:

early 16th century: Latin