TRIMESTER

Pronunciation (US): (GB):

I. (noun)

Sense 1

Meaning:

One of three divisions of an academic year

Classified under:

Nouns denoting time and temporal relations

Hypernyms ("trimester" is a kind of...):

academic session; academic term; school term; session (the time during which a school holds classes)

Holonyms ("trimester" is a part of...):

academic year; school year (the period of time each year when the school is open and people are studying)

Sense 2

Meaning:

A period of three months; especially one of the three three-month periods into which human pregnancy is divided

Classified under:

Nouns denoting time and temporal relations

Hypernyms ("trimester" is a kind of...):

period; period of time; time period (an amount of time)

Hyponyms (each of the following is a kind of "trimester"):

first trimester (time period extending from the first day of the last menstrual period through 12 weeks of gestation)

second trimester (time period extending from the 13th to the 27th week of gestation)

third trimester (time period extending from the 28th week of gestation until delivery)

Holonyms ("trimester" is a part of...):

gestation; gestation period (the period during which an embryo develops (about 266 days in humans))

Credits

Context examples:

The mice were exposed during gestation, between 10 days after fertilization and birth, which corresponds to the middle of the first trimester and birth in humans.

(Low-level arsenic exposure before birth associated with early puberty and obesity in female mice, NIH)

A physical feeling of being able to breathe better during late trimester of pregnancy when the baby starts to descend lower into the pelvic cavity.

(Physiologic Lightening, NCI Thesaurus)

Of women who had elevated blood pressure in the first trimester (120/80 to 129/80 mmHg), 30.3% developed a hypertensive disorder of pregnancy, a 42% higher risk than for women with normal blood pressure (less than 120/80 mmHg).

(Elevated blood pressure in first trimester increases risk for blood pressure disorder later in pregnancy, National Institutes of Health)

One that is abnormally prone to dilate in the second trimester of pregnancy, resulting in premature expulsion of the fetus.

(Incompetent Cervix, NCI Thesaurus)

These risks were in comparison to infants who were either not exposed to tobacco or alcohol during gestation or whose mothers quit tobacco or alcohol use by the end of the first trimester.

(Combined prenatal smoking and drinking greatly increases SIDS risk, National Institutes of Health)

A physiological progestin that is produced during glucocorticoid and steroid hormone synthesis and is increased during the third trimester of pregnancy.

(Hydroxyprogesterone, NCI Thesaurus)

Transplacental infection of the fetus with rubella usually in the first trimester of pregnancy, as a consequence of maternal infection, resulting in various developmental abnormalities in the newborn infant.

(Congenital Rubella, NLM, Medical Subject Headings)

The babies were pre-term and full-term, ranging from 30 to 42 weeks gestational age (equivalent), so their development could reflect what's typical in the last trimester of pregnancy.

(Baby Hiccups Key to Brain Development, The Titi Tudorancea Bulletin)

Severe, intractable vomiting during pregnancy (usually the first trimester) accompanied by dehydration, weight loss, and electrolyte imbalances.

(Hyperemesis Gravidarum, NCI Thesaurus)

During each trimester, the fetus grows and develops.