The speed of sound.
In fluid mechanics, the ratio between the speed of an object moving through a fluid to the speed of sound in that fluid. Mach numbers less than one indicate subsonic flow (the sound moves faster than you); Mach numbers greater than one indicate supersonic flow (you are faster than the sound).
- E. Mach and P. Salcher:
Photographische Fixirung der durch Projectile in der Luft eingeleiteten Vorgänge.
(Peter Salcher (Austrian photographer, 1848-1928).
Sitzungsberichte der Akademi der Wissenschaften in Wien, 1887, 95: 764-780.
The experiments described in this classic paper were carried out in Fiume with the support of the Royal Austrian Navy. P. Salcher worked at the Marine Academy in Fiume.
What is an eponym?
An eponym is a word derived from the name of a person, whether real or fictional. A medical eponym is thus
any word related to medicine, whose name is derived from a person.
What is Whonamedit?
Whonamedit.com is a biographical dictionary of medical eponyms.
It is our ambition to present a complete survey of all medical phenomena named for a person,
with a biography of that person.
Whonamedit? does not give medical advice.
This survey of medical eponyms and the persons behind them is meant as a general interest site only.
No information found here must under any circumstances be used for medical purposes, diagnostically,
therapeutically or otherwise. If you, or anybody close to you, is affected, or believe to be
affected, by any condition mentioned here: see a doctor.