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“Unicorpses” and other Valley jargon, defined

Hasbro Inc. Products Ahead Of Earning FiguresHasbro Inc. Products Ahead Of Earning Figures

If you’ve been paying attention to Silicon Valley this year, you’ve likely heard of a startup unicorn. (If you haven’t, read our cover story, The Age of Unicorns, from January.) The proliferation of these billion-dollar startups has created its own vocabulary. Here’s our guide to speaking the language.

One-on-One Deal: A $100 million round of funding with a $1 billion valuation.

My Little Pony: A startup worth $10 million or more. (Coined by Dave McClure, founder of accelerator program 500 startups.)

Centaur: A startup worth $100 million or more.

Decacorn: A startup worth $10 billion or more.

Quinquagintacorn: A startup worth $50 billion or more (see Uber).

Unicorpse: A former unicorn, now valued at less than $1 billion.

*Honest, we didn’t make these up.

To see our full unicorn list, click here.

A version of this article appears in the September 15, 2015 issue of Fortune magazine with the headline “Not all unicorns are created equal.”