triangular prism

three years; the third year / (education) the third school year / (figuratively) a long period of time, several years

three years; triennial / three years old

three years of age, three years old

(anatomy) a secondary sex characteristic

first discoverer (used especially in reference to the discovery of a dead body)

the best or top person, such as the best performer in a company, or a leading expert

a right-angled triangle

(phonetics) in Sanskrit phonology, a consonant produced using one of the three places of articulation: dorsal (/k, g, ŋ/), coronal (/t, d, n/), or labial (/p, b, m/)

a male given name