syndrome X

British

noun

another name for IRS

"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

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.

Doctors called it “cardiac syndrome X.”

From Scientific American

"OMG I'm actually a 100 year old mermaid formerly known as 'CC Chalice' ....thanks shady Australian press for your tall poppy syndrome x," she wrote, adding, "Okay but all jokes aside now...my real name is Fat Patricia x"

From Los Angeles Times

His search for a genetic basis for immortality, or at least for prolonged youth, has led him to a disease so rare and so poorly researched that it's known only by the unofficial name syndrome X: “what seems to be a permanent state of infancy,” which Walker has identified in four girls.

From The New Yorker

Her condition, which she shares with a handful of other people around the world and which kept her both physically and mentally stunted, was labeled Syndrome X by her doctors, but the X was merely a stand-in for unknown.

From Time

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023