"I before E, except after C" is a mnemonic rule of thumb for English spelling. If one is unsure whether a word is spelled with the digraph ei or ie, the rhyme suggests that the correct order is ie unless the preceding letter is c, in which case it may be ei. The rhyme is very well known; Edward Carney calls it "this supreme, and for many people solitary, spelling rule". However, the short form quoted above has ; for example: * ie after c: species, science, sufficient * ei not preceded by c: seize, vein, weird, their, feisty, foreign