trimester
C1formal, medical, academic
Definition
Meaning
A period of three months, especially one of the three three-month periods into which a pregnancy is divided, or one of the three divisions of an academic year.
Any period or stage lasting three months. In some financial contexts, it can refer to a quarter of a year. Also used in certain educational systems (primarily US and international) to denote one of three main divisions of the school/university year.
Linguistics
Semantic Notes
Most strongly associated with pregnancy and education. In non-medical contexts, 'quarter' is more common for three-month financial periods, though 'trimester' is understood.
Dialectal Variation
British vs American Usage
Differences
In British English, 'term' is standard for academic divisions (autumn, spring, summer). 'Trimester' is primarily a medical term. In American English, 'trimester' is common in both academic and medical contexts.
Connotations
UK: Strongly medical/pregnancy. US: Neutral for education and medicine.
Frequency
Higher frequency in American English due to academic use.
Vocabulary
Collocations
Grammar
Valency Patterns
[during/in] the [first/second/third] trimester (of [pregnancy/school])the [adjective] trimesterVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[No common idioms specifically with 'trimester']”
Usage
Context Usage
Business
Rare. 'Quarter' or 'Q1/Q2/Q3' is preferred for financial reporting.
Academic
Common in US and international schools/universities to describe one of three main grading periods.
Everyday
Primarily used when discussing pregnancy.
Technical
Standard in obstetrics and gynecology.
Examples
By Part of Speech
verb
British English
- [No standard verb form]
American English
- [No standard verb form]
adverb
British English
- [No standard adverb form]
American English
- [No standard adverb form]
adjective
British English
- trimesterly assessments
- trimester-based system
American English
- trimester schedule
- trimester break
Examples
By CEFR Level
- She is in her second trimester of pregnancy.
- Our school year has three trimesters.
- Morning sickness is most common in the first trimester.
- I have exams at the end of every trimester.
- The university switched from a semester system to a trimester system to allow more course flexibility.
- The risk of certain complications decreases after the first trimester.
- The trimester's financial results failed to meet analysts' projections, though the annual forecast remains stable.
- Her research focuses on epigenetic changes occurring during the critical first trimester of gestation.
Learning
Memory Aids
Mnemonic
Think: TRI (three) + MESTER (like 'semester', but for three parts). A semester is half a year; a trimester is three parts of a year.
Conceptual Metaphor
TIME IS A CONTAINER DIVIDED INTO SECTIONS (e.g., 'in the first trimester'); A PROCESS IS A JOURNEY THROUGH STAGES (e.g., 'entering the final trimester').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct translation of academic 'semester' (семестр) as 'trimester'. Russian 'триместр' is a direct loanword but used almost exclusively in medical contexts.
Common Mistakes
- Using 'trimester' to mean any term at university (UK). Confusing 'trimester' (3 parts) with 'semester' (2 parts).
Practice
Quiz
In which context is 'trimester' MOST commonly used in British English?
FAQ
Frequently Asked Questions
A trimester divides a year into three parts, while a semester divides it into two (e.g., fall and spring).
It's understood but not standard. 'Quarter' is the typical business term for a three-month period.
Very rarely. UK schools use 'terms' (typically three: autumn, spring, summer). 'Trimester' is seen as an American academic term.
They mark three distinct stages of fetal development and changes for the pregnant person, each roughly three months long.