| русский | rus-000 |
| двояковогнутый | |
| Universal Networking Language | art-253 | biconcave(icl>adj) |
| Universal Networking Language | art-253 | concavo-concave(icl>adj,equ>biconcave) |
| беларуская | bel-000 | дваякаўвагнуты |
| 普通话 | cmn-000 | 双凹 |
| 國語 | cmn-001 | 雙凹 |
| Hànyǔ | cmn-003 | shuāngyāo |
| eesti | ekk-000 | bikonkaavne |
| eesti | ekk-000 | kaksiknõgus |
| English | eng-000 | amphicelous |
| English | eng-000 | amphicoelous |
| English | eng-000 | biconcave |
| English | eng-000 | concavo-concave |
| English | eng-000 | concavoconcave |
| English | eng-000 | double concave |
| English | eng-000 | double upwards |
| English | eng-000 | double-concave |
| English | eng-000 | doubly concave |
| Esperanto | epo-000 | bikonkava |
| suomi | fin-000 | kaksoiskovera |
| français | fra-000 | biconcave |
| עברית | heb-000 | קעור משני צידיו |
| 日本語 | jpn-000 | 両凹 |
| 日本語 | jpn-000 | 両凹面 |
| latviešu | lvs-000 | abpusēji ieliekts |
| latviešu | lvs-000 | bikonkāvs |
| русский | rus-000 | амфицельный |
| tiếng Việt | vie-000 | hai mặt lõm |