seconder
se·con·der
noun
1.
someone who endorses a motion or petition as a necessary preliminary to a discussion or vote
Origin
From second + -er (measurement suffix) or + -er (agent noun suffix).
Related words
Word family
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.