trimonthly
adjective
tri·month·ly (ˌ)trī-ˈmən(t)th-lē 
: occurring every three months
Word History
First Known Use
1856, in the meaning defined above
- deliriously
- deliriousness
- deliriousnesses
- delirium
- delirium tre
- delirium tremens
- deliriums
- delis
- delish
- delist
- delisted
- delisting
- delists
- delitescence
- delitescences
- delitescencies
- delitescency
- delitescent
- Delius
- deliver
- deliver on
- deliver oneself of
- deliver over into
- deliver over to
- deliver the goods