How'd You Fit so Many Y's in that Word?

So this week's medical word of the week has 3 Y's (1), and is also the most unique (2) vocabulary word so far. 

Brachydactyly

Mr. MedSchool's Definition:  Abnormaly short finger(s)

Real Medical Definition: an inherited, usually dominant trait which literally means "shortness of the fingers and toes" (digits)

And as a special bonus, Mr. MedSchool sent me a picture as well!

1. and as Mr. MedSchool put it, 3 Y's how can you beat that?

2. Nice word for weird