American Heritage Dictionary
(3)
Century Dictionary
(5)
GNU Webster's 1913
(2)
WordNet
(2)
Elsewhere on the web
I'm beginning to sound like a hypochondriac, I know, I know ...— Wrong Planet Asperger / Autism Forums
He was a hypochondriac, a recluse, 'strangely' he didn't use the word 'evolution' in his book, he rushed into print with a book title that wasn't snappy, and he had 'awful misgivings' about his theory.— Planet Atheism
I ` m a happy hypochondriac, says Sir Roger Moore ...— MI6 :: 007 News

Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word a few times a year.