What is a good Spanish-English dictionary for a grad student in biotechnology?

Hi! I'm a writing tutor in a grad-level biotechnology class, and a student has asked me for a good Spanish-English dictionary to use in the course. Any suggestions?What is a good Spanish-English dictionary for a grad student in biotechnology?
If you don't get a good answer here, you or your student can check out either www.WordReference.com or www.ProZ.com. The first is an online dictionary with a pretty active forums section to ask questions in and the latter is a site for professional translators.

Bio-tech isn't my field, so I'd only be able to recommend general use dictionaries myself, but the above should be able to point you towards something more specialized.What is a good Spanish-English dictionary for a grad student in biotechnology?
Ask your professor and/or at the school book store. They should be able to recommend what is best.

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