n. a calliper device for measuring the size of the testicles. The Prader orchidometer consists of a collection of testicle-shaped beads of different sizes, each of known volume, for direct comparison to and sizing of the testicles. It enables the precise charting of testicular growth.... orchidometer
(Prader–Willi–Labhart syndrome) a congenital condition that is inherited as an autosomal *dominant trait and is due to an abnormality of chromosome 15 (see imprinting). It is marked by pathological overeating and resulting obesity (affected children often subsequently develop type 2 diabetes), lethargy, short stature, a characteristic facial expression, learning disabilities, and underactivity of the testes or ovaries (*hypogonadism) due to lack of pituitary gonadotrophins. It is a cause of delayed puberty. [A. Prader, H. Willi, and A. Labhart (20th century), Swiss paediatricians]... prader–willi syndrome
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