The Collaborative International Dictionary
Shrouded gear
Shrouded \Shroud"ed\, a. Provided with a shroud or shrouds.
Shrouded gear (Mach.), a cogwheel or pinion having flanges which form closed ends to the spaces between the teeth and thus strengthen the teeth by tying them together.
Wiktionary
shrouded gear
n. A cogwheel or pinion having flanges which form closed ends to the spaces between the teeth and thus strengthen the teeth by tying them together.