| English | German |
| blue antimora | Blauhecht (Antimora rostrata) |
| blue-bell | Glockenblume (Campanula) |
| blue-billed malimbe | Rotkehlweber (Malimbus nitens) |
| blue bottle | blaue Schmeissfliege (Calliphora) |
| blue bottle fly | blaue Schmeissfliege (Calliphora) |
| blue butterfish | Pampelfisch (Fiatola fasciata, Seserinus microchirus, Stromateus fiatola (Linnaeus)) |
| blue butterfish | Gemeine Pampel (Fiatola fasciata, Seserinus microchirus, Stromateus fiatola (Linnaeus)) |
| blue crab | Blaukrabbe (Callinectes sapidus(Rathbun,1896)) |
| blue crab | Blaue Schwimmkrabbe (Callinectes sapidus(Rathbun,1896)) |
| blue-crowned pigeon | Krontaube (Goura cristata) |
| blue disease of banana | "Bananenblaeue" Blauverfaerbung |
| blue grenadiers | Grenadiere (Macruronus) |
| blue grey fly | schwarze Citrusfliege (Aleurocanthus woglumi) |
| blue gum | Southern blue gum (Eucalyptus globulus) |
| blue head | Brillenvogel (Diloba caeruleocephala, Episema caeruleopcephala) |
| blue head | Blaukopf (Diloba caeruleocephala, Episema caeruleopcephala) |
| blue horntail | blaue Kiefernholzwespe (Paururus juvencus, Sirex juvencus) |
| blue marsh vetchling | Sumpfwicke (Lathyrus palustris L.) |
| blue melilot | Schabziegerklee (Trigonella coerulea) |
| blue melilot | Bisamklee (Trigonella coerulea) |
| blue melilot | Balsamklee (Trigonella coerulea) |
| blue moor grass | Kopfgras (Sesleria coerulea) |
| blue moor grass | blaues Kopfgras (Sesleria coerulea) |
| blue moor grass | Burst (Sesleria coerulea) |
| blue moor grass | Blaugras (Sesleria coerulea) |
| blue sky research | Grundlagenforschung |
| blue thistle | gemeiner Natterkopf (Echium vulgare) |
| blue thistle | blauer Natterkopf (Echium vulgare) |
| blue walleye | Glasaugenbarsch (Stizostedion vitreum glaucum) |
| blue water speedwell | Ufer-Ehrenpreis (Veronica anagallis-aquatica L., Veronica undulata Wall.) |
| blue water speedwell | Gauchheil-Ehrenpreis (Veronica anagallis-aquatica L., Veronica undulata Wall.) |
| methylene blue dye absorption test | Methylenblautest |
| perennial blue tagged | deutsches Weidelgras (Lolium perenne L.) |
| steel-blue wood wasp | blaue Fichtenholzwespe (Paururus noctilio, Sirex noctilio) |
| steel-blue wood wasp | blaue Kiefernholzwespe (Paururus juvencus, Sirex juvencus) |
