is widely acknowledged as being the longest word in the English language that does not repeat a letter.
Why do I care?
Well, as a consumer of all things trivial (helloooo. what's my name?), I also have a practical reason for knowing as many non-letter repeating words as possible.
A few months ago, as soon as The Kid was old enough for baths in the big tub (vice the kitchen sink) The Wife bought a set of foam letters that stick to the side of the tub. The only problem is that there is only one of each letter. Needless to say, that makes the number of words I can spell rather limited. It doesn't help that I have a compulsion to spell a different word every night.
Before you say it, I am well aware that OCD does not repeat a letter.