The Columbia Encyclopedia, Sixth Edition. 2001-07.
Lilienthal, Otto
(ô´t l´lyntäl) (KEY) , 184896, German aeronautical engineer, a pioneer in his experiments with gliders. He made major developments in the glider based on his observations of birds and wrote a number of books on aviation. His brother, Gustav Lilienthal, 18491933, was associated with Otto in his flying experiments and continued them after his brothers death.