| Subject | Italian | English |
| comp., MS | segmento di codice conto principale | main account code segment (A segment of a general ledger account code that corresponds to the type of account (for example, cash, sales, or travel expense)) |
| med. | segmento principale | main secreting portion of gland |
| med. | segmento principale | main part of nephron |
| med. | segmento principale del fonocardiogramma | first heart sound segment |