Murasugi sum
A maneuver in bullfighting in which a bullfighter tries to get a bull's attention by manipulating his cape.
The union of a finite sequence of surfaces taken over a disk common to every adjacent pair of the sequence, such that the boundary of the disk comprises some even number of closed arcs, disjoint except at their endpoints, which are alternatingly subarcs of the two surfaces' boundaries.
In the manner of a mirror reflection; reversed.
simple past tense and past participle of upclock
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