The story
By analogy with the king penguin, which was believed to be the largest.
Etymology from Wiktionary, CC BY-SA 4.0.
emperor penguin
Today it means: The largest of penguins (Aptenodytes forsteri), that inhabits Antarctica. Full definition →
Today it means: The largest of penguins (Aptenodytes forsteri), that inhabits Antarctica. Full definition →
By analogy with the king penguin, which was believed to be the largest.
Etymology from Wiktionary, CC BY-SA 4.0.