Definition of 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