The smallest unit of sound in a language that can distinguish meaning is called a:AMorphemeBPhonemeCSyllableDGraphemeAnswer: B. Phoneme Read Explanation: The smallest unit of sound in a language that can distinguish meaning is called a phoneme. A phoneme is a basic unit of sound that, when changed, can alter the meaning of a word. For example, the "b" sound in "bat" and the "p" sound in "pat" are different phonemes because they change the meaning of the word. Read more in App