Our usual thanks to OED, but a special one too this time.  One of the words we have been working into our sentences in recent years is this word that had two primary definitions different from the one we associated with one of our favorite biologists.  Now they have added a third definition, thanks to E.O. Wilson and everyone who follows his ideas and words, and repeats them:

3. A love of or empathy with the natural world, esp. when seen as a human instinct.