IPA: /əˈdjuːsər/
KK: /əˈdjuːsər/
A person who brings forward or presents evidence, arguments, or reasons in support of a claim or statement.
The adducer presented compelling evidence to support the argument.
Adducer is formed from "ad-" (meaning to) and "ducere" (meaning to lead). The word refers to the act of leading someone or something to a particular place or conclusion.
Think of 'leading to' ('ducere') something or someone ('ad-') — that's why adducer means to lead someone to a conclusion.