The Collaborative International Dictionary
Cycloidal \Cy*cloid"al\ (-al), a. Pertaining to, or resembling, a cycloid; as, the cycloidal space is the space contained between a cycloid and its base.
Cycloidal engine. See Geometric lathe. [1913 Webster] ||
Wiktionary
a. pertaining to or resembling a cycloid; or a circle.
WordNet
adj. resembling a circle [syn: cycloid]
Usage examples of "cycloidal".
Fully assembled the hovercraft was a simple affair, with a big fan at the rear and two cycloidal impellers filling the skirt with air.
The Sounder's two cycloidal propellers, one forward and one aft, thrashed the water as her great diesel engine strained under the load.
When the charms of simple technology paled and Ocala enjoyed a brief spurt of highly sophisticated manufacturing, Kyllikki acquired a solar powered auxiliary engine that drove a pair of retractable cycloidal impeller rotors, similar to those in the all-terrain vehicles that the Rebels had originally brought with them from the Milieu.