cardinal
n.— «Subcommittee chairmen are sometimes referred to as “cardinals” on Capitol Hill, for the influence they wield.» —“Kingston’s panel axed in changes” by Bob Kemper in Washington, D.C. Atlanta Journal-Constitution (Ga.) Feb. 10, 2005. (source: Double-Tongued Dictionary)
Further reading
Cat hair may be something you brush off, but cat hair is also a slang term that means “money.” In the same way, cat beer isn’t alcoholic — some people use cat beer as a joking term for “milk.” And imagine walking on a...
Have you ever googled your own name and found someone else who goes by the very same moniker? There’s a word for that: googleganger. Plus, the language of hobbyists and enthusiasts: If you’re a beekeeper, perhaps you call yourself a...