Official first word: nap.

Elaine's been accompanying her attempts to communicate with sounds for a while now, but this is the first time she's pronounced an entire word (not just a first syllable like "dah" while pointing at a dog or duck) in order to communicate an idea. As long as she wants something concrete -- the fruit, bread, or water on the table in front of her, she can verbalize something vague and point. But, I was nowhere near figuring out she wanted to take a nap until she actually exclaimed "nap!"