Adjective
desmodromic (not comparable)
(of a mechanical device) Having different controls for its actuation in different directions, especially of an engine valve that is positively closed by a cam and leverage system rather than springs.
Ducati is also famous for using the desmodromic valve system championed by engineer and designer Fabio Taglioni, though the firm has also used engines that use valve springs to close their valves. Source: Internet
Founded in 1926, since 1946 Ducati has been manufacturing sport-inspired motorcycles characterised by high-performance Desmodromic engines, innovative design and cutting-edge technology. Source: Internet
These valves do not suffer from valve float at high engine speeds, thus a desmodromic engine is capable of far higher revolutions than a similarly configured engine with traditional spring-valve heads. Source: Internet