Tapering (mathematics)
WordNet

adjective


(1)   Gradually narrowed toward a point
"A tall tapering spire"
(2)   Gradually decreasing until little remains
(3)   Becoming gradually narrower
"Long tapering fingers"
"Trousers with tapered legs"

noun


(4)   The act of gradually lowering the size or amount
"The doctor prescribed the tapering of the dose"
 
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