downspout

(redirected from rain leader)
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down·spout

 (doun′spout′)
n.
A vertical pipe for carrying rainwater down from a roof gutter.

downspout

(ˈdaʊnˌspaʊt)
n
(Building) US and Canadian a pipe for carrying rainwater from a roof gutter to the ground or to a drain. Also called: drainpipe or downpipe (in Britain and certain other countries)

down•spout

(ˈdaʊnˌspaʊt)

n.
a vertical pipe for conveying rainwater from a roof or gutter to the ground or to a drain; leader.
[1895–1900]