polyphonic letter

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a letter that has two or more pronunciations
- 'c' is a polyphone because it is pronounced like 'k' in 'car' but like 's' in 'cell'
• Syn:
polyphone
• Derivationally related forms:
polyphonic (for: polyphone)
• Hypernyms:
letter, letter of the alphabet, alphabetic character