| Subject | English | Spanish |
| met. | black finishing of non-ferrous metals | ennegrecer |
| met. | black finishing of non-ferrous metals | pavonar acero |
| met. | black finishing of non-ferrous metals | colorar metales |
| agric. | black locust | falsa acacia (Robinia pseudoacacia) |
| nat.sc., agric. | black mould | Alternaria |
| agric. | black mould | fumagina (Apiosporium ssp.) |
| fish.farm. | black-mouth catshark | colayo (Galeus melastomus, Pristiurus melanostomus) |
| fish.farm. | black-mouth catshark | olayo (Galeus melastomus, Pristiurus melanostomus) |
| fish.farm. | black-mouth catshark | bocanegra (Galeus melastomus, Pristiurus melanostomus) |
| fish.farm. | black-mouthed dogfish | bocanegra (Galeus melastomus, Pristiurus melanostomus) |
| fish.farm. | black-mouthed dogfish | colayo (Galeus melastomus, Pristiurus melanostomus) |
| fish.farm. | black-mouthed dogfish | olayo (Galeus melastomus, Pristiurus melanostomus) |
| fish.farm. | black-mouthed dogfish | golayo (Galeus melastomus, pristiurus melanostomus) |
| chem. | black PN | E151 |
| agric. | black scale | mangla (Saissetia oleae) |
| fish.farm. | black sea bream | chopa (Cantharus cantharus, Cantharus griseus, Spondyliosoma cantharus (Linnaeus)) |
| fish.farm. | black sea bream | chopa (Mylio macrocephalus, Spondyliosoma cantharus) |
| nat.res., fish.farm. | black seabream | chopa (Cantharus cantharus, Cantharus griseus, Cantharus lineatus, Spondyliosoma cantharus) |
| fish.farm. | black umber | corvallo (Corvina nigra, Sciaena umbra (Linnaeus,1758)) |
| met. | blacking hole | cavidad negra |
| met. | blacking scab | piel negra |
| met. | foundry blacking | polvo de carbón |
| met. | foundry blacking | negro de fundición |