Handy biology dictionary goes online

Dr. Christopher Chen aims to put definitions for common biology terms at everyone's fingertips, and he wrote me asking me to take a look at his site.  A quick glance over his Biology Dictionary is very promising. Dr. Chen's explanation of three sample terms I checked (species, chordate, and sexual reproduction) are very clear. The writing is good, there are hundreds of terms here, and on the whole this looks like a great resource.  The only nit I can pick is that the  writing isn't quite flawless: Dr. Chen occasionally drops an "s," writing "scientist" when he meant "scientists," That, however, is a VERY minor issue.  I'm happy to recommend his site.