1. An instrument for measuring sounds, as to their intensity, or the frequency of the vibrations

Derived forms: phonometers

• Charles Frederick Menninger
• Charles Frederick Worth
• Charles Goodyear
• Charles Grey
• Charles Hard Townes
• Charles Hardin Holley
• Charles Henry Harrod
• Charles Herbert Best
• Charles I
• Charles II
• Charles IX
• Charles James Fox
• Charles John Huffam Dickens
• appreciation
• appreciative
• appreciatively
• appreciativeness
• appreciator
• appreciatory
• apprehend
• apprehended
• apprehender
• apprehensible
• apprehension
• apprehensive