You searched for: “trimester
1. A period or term of three months; specifically, each of three such periods into which human gestation (from conception to birth) is divided:
  1. First trimester, the first three months of pregnancy.
  2. Second trimester, the middle three months of pregnancy.
  3. Third trimester, the third and final three months of pregnancy.
2. One of the three terms into which the academic year is divided by some U.S. Colleges, schools, universities; as well as, some educational systems in other parts of the world.
This entry is located in the following unit: tri-, tre- (page 8)
Word Entries at Get Words: “trimester
The nine months of pregnancy which is traditionally divided into three trimesters or distinct periods of roughly three months in which different phases of fetal development progress.