trimester [trimesters](period of three months) noun [UK: traɪ.ˈme.stə(r)] [US: traɪ.ˈme.stər]
trimestrenoun {m}
quarter [quarters](period of three months) noun [UK: ˈkwɔː.tə(r)] [US: ˈkwɔːr.tər]During the first quarter we'll make two rounds of orals. = Nel primo trimestre faremo due giri di orali.