tri·month·ly 
(trī-mŭnthlē)
(trī-mŭnthlē)adj.
Done, occurring, or appearing every three months.
tri·monthly adv.
- Antibes
- antibiosis
- antibiotic
- antibiotically
- antibody
- antibusiness
- antic
- antically
- anticancer
- anticancerous
- anticatalyst
- anticathode
- antichlor
- anti-choice
- anticholinergic
- anticholinesterase
- antichrist
- anticipant
- anticipatable
- anticipate
- anticipation
- anticipative
- anticipatively
- anticipator
- anticipatory