The story
Originally described in 1908 by Austrian educator Theodor Heller (1869–1938).
Etymology from Wiktionary, CC BY-SA 4.0.
Heller's syndrome
Today it means: Childhood disintegrative disorder. Full definition →
Today it means: Childhood disintegrative disorder. Full definition →
Originally described in 1908 by Austrian educator Theodor Heller (1869–1938).
Etymology from Wiktionary, CC BY-SA 4.0.