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| Spanish | English |
| babosa de tres aletas | triple-fin blenny (Tripterygion nasus, Tripterygion tripteronotum) |
| fruto lleno tres-cuartos | three-quarters full fruit |
| fusilero de tres bandas | three-stripe fusilier (Pterocaesio trilineata) |
| galio de tres flores | corn cleavers (Galium tricorne Stokes/With., Galium tricornutum Dandy) |
| mero de tres manchas | three-spot grouper (Epinephelus trimaculatus) |
| regla de las tres R | three "R"s rule |
| satirión de tres bulbos | summer ladies'tresses (Spiranthes aestivalis) |
| satirión de tres raíces | summer ladies'tresses (Spiranthes aestivalis) |
| satirión de tres testículos | summer ladies'tresses (Spiranthes aestivalis) |
| tres-cuartos definidos | three-quarters normal |
| tres-cuartos justos | three-quarters thin |