The plural of sphinx is sphinges. What's the plural of octopus?
Some words have very odd plural versions. Cul de sac becomes Culs de Sac. Thesis becomes theses. Octopus becomes octopi. And sphinx apparently becomes sphinges. Where did that come from?
A sphinx is a creature with the head of a person and a body of a lion. It is also an ancient Greek monster. The best known sphinx is probably the giant sphinx statue built in ancient Egypt. It can also be a mysterious or inscrutable person.
Since there isn't usually more than one sphinx at a time, people don't often use the plural version. Hence why sphinges sounds so odd. It pronounced almost exactly as it sounds — sfin - jeez.
