Butterfly fish (Zool.), the ocellated blenny (Blennius ocellaris) of Europe. See Blenny. The term is also applied to the flying gurnard.
Butterfly shell (Zool.), a shell of the genus Voluta.
Butterfly valve (Mech.), a kind of double clack valve, consisting of two semicircular clappers or wings hinged to a cross rib in the pump bucket. When open it somewhat resembles a butterfly in shape.
... mixing chamber to the intake manifold is controlled by a butterfly valve which is called the throttle-valve and is connected to the throttle-lever on the steering wheel as well as to the foot accelerator, its position determining the amount of gas and air or mixture being fed ... — Marvel Carbureter and Heat Control - As Used on Series 691 Nash Sixes Booklet S • Anonymous Read full book for free!
...
Read full book for free!
