| Subject | English | French |
| IT | directed line segment | segment de droite orienté |
| comp., MS | line segment | segment de ligne (A portion of a line, defined by its beginning and ending points) |
| IT | line segment | segment de droite |
| el. | line segment | section de câble optique |
| tech. | line segment | tronçon |
| math. | straight-line segment | segment de droite |
| commun. | terminal leased line segment | segment terminal de ligne louée |
| commun., IT | terminating segment of a leased line | segment terminal de la ligne louée |