Technically speaking, the American Heritage dictionary tells us:
liv·id ( P ) Pronunciation Key (lvd) adj.
Discolored, as from a bruise; black-and-blue.
Ashen or pallid: a face livid with shock.
Extremely angry; furious.
Also, I'd like to state for the record that it's my considered opinion that Mr. Powers' reading of Whitman is lukewarm crap.
But, you know. If he could be bothered to fact-check, he'd have a pretty good point.