Dictionary.com
Thesaurus.com

downcomer

American  
[doun-kuhm-er] / ˈdaʊnˌkʌm ər /

noun

  1. a pipe, tube, or passage for conducting fluid materials downward.


downcomer British  
/ ˈdaʊnˌkʌmə /

noun

  1. Also called: downcome.  a pipe that connects a cistern to a WC, wash basin, etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of downcomer

First recorded in 1865–70; down 1 + comer

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

But I dreaded to be found eating, alone in that vast room, by the first downcomer.

From Seven Men by Beerbohm, Max, Sir