family Triglidae
— Noun
– English
~ in some classifications restricted to the gurnards and subdivided into the subfamilies Triglinae (true sea robins) and Peristediinae (armored sea robins)
family Trilliaceae
— Noun
– English
~ small family of herbs having flowers with 3 petals and 3 sepals; in some classification systems considered a subfamily of the Liliaceae
first trimester
— Noun
– English
~ time period extending from the first day of the last menstrual period through 12 weeks of gestation