| Subject | English | Arabic |
| environ. | secondary biotope In the case of disruption of an existing biotope, secondary biotope can be created as a compensation and substitute measure for the loss of the natural one | موطن حيوي ثانوي |
| comp., MS | secondary database | قاعدة بيانات ثانوية (In log shipping, a read-only database that was created by restoring a full backup of the primary database (without recovery) on a separate server instance (the secondary server). Log backup from the primary database is restored at regular intervals onto the secondary database) |
| environ. | secondary education The years of instruction following elementary school and until the end of high school | التعليم الثانوي |
| UN, biol., sec.sys. | secondary forest | غابة ثانوية |
| UN, ecol. | secondary pollutant | ملّوث ثانوي |
| math. | secondary process | عملية ثانوية |
| comp., MS | secondary quotation | عرض أسعار ثانوي (A quotation that competes with other quotations for the same good or service and is linked to a primary quotation) |
| environ. | secondary sector The part of a country or region's economy that produces commodities without much direct use of natural resources | قطاع ثانوي |
| comp., MS | secondary server | ملقم ثانوي (In a log shipping configuration, the server instance where the secondary database resides. At regular intervals, the secondary server copies the latest log backup from the primary database and restores the log to the secondary database. The secondary server is a warm standby server) |
| comp., MS | secondary tile | لوحة ثانوية (A shortcut to places within an app or to other content) |
| environ. | secondary treatment Stage of the process of waste water treatment: following primary treatment by sedimentation, the second step in most wastewater systems in which biological organisms decompose most of the organic matter into a innocuous, stable form | معالجة ثانوية |
| math. | secondary unit | وحدة ثانوية، وحدة مرحلة ثانية |
| comp., MS | secondary window | النافذة الثانوية (A window that provides information or supplemental interaction related to objects in a primary window) |
| comp., MS | secondary zone | منطقة ثانوية (A read-only copy of a DNS zone that is transferred from an authoritative DNS server to another DNS server to provide redundancy) |