Abacus
From Hull AWE
Although OED records the only plural of abacus as abaci (the regularly formed plural in Latin, its original language), Burchfield's Fowler calls this "pedantic", and advises abacuses. So does AWE.
- The word abacus, and its plural abacuses, is one of the list of The 2,000 Most Misspelt Words in the English Language in King, 2001.
