| Subject | French | Spanish |
| nat.res. | araignée ancestrale à terrier operculé | araña de tapadera ancestral (Liphistius, Lipistius) |
| life.sc., fish.farm. | opercule branchial | opérculo |
| mech.eng. | opercule de sécurité | disco de ruptura |
| med. | opercule frontal | opérculo frontal |
| med. | opercule frontal inférieur | preopérculo (praeoperculum) |
| med. | opercule frontal inférieur | región triangular de la tercera circunvolución frontal (praeoperculum) |
| med. | opercule fronto-pariétal | opérculo rolándico (operculum frontoparietale) |
| med. | opercule fronto-pariétal | opérculo de la insula |
| med. | opercule fronto-pariétal | opérculo frontoparietal (operculum frontoparietale) |
| med. | opercule rolandique | opérculo frontoparietal (operculum frontoparietale) |
| med. | opercule rolandique | opérculo rolándico (operculum frontoparietale) |
| med. | opercule temporal | opérculo temporal (operculum temporale) |
| transp. | opercule à crever | disco rompible |
| construct. | vanne à opercule | compuerta anular |
| chem., el. | vanne à simple opercule | válvula de compuerta con obturador en forma de cuña de una p |