tri·mes·ter 
(trī-mĕstər, trīmĕs′-)
(trī-mĕstər, trīmĕs′-)n.
1. A period or term of three months.
2. One of three terms into which an academic year is divided in some universities and colleges.
[French trimestre, from Latin trimēstris, trimēnstris, of three months : tri-, tri- + mēnsis, month; see mē-2 in the Appendix of Indo-European roots.]
tri·mestral (-trəl), tri·mestri·al (-trē-əl) adj.
- recognizably
- recognizance
- recognizant
- recognize
- recognizer
- recoil
- recoiler
- recoilless
- re-collect
- recollect
- re-collect
- recollect
- recollection
- recollective
- re-collect (oneself)
- recollect (oneself)
- re-collect oneself
- recollect oneself
- recombinant
- recombinant DNA
- recombinase
- recombination
- recombine
- recommend
- recommendable