taper
(n) : a slender wax candle; a small lighted wax candle; hence, a small light; a tapering form; gradual diminution of thickness in an elongated object; as, the taper of a spire
"the legs of the table had a slight taper to them."
(adj) : regularly narrowed toward the point; becoming small toward one end; as, taper fingers
(v) : to make thinner or narrower at one end; to diminish gradually
synonyms: conical, pyramidical, convex shape more», convexity, narrowing, cord, lamp