Definition of acrophonic in English:

acrophonic

adjective

  • Relating to or based on acrophony. Also of the symbol for a numeral: based on the letter representing the initial sound of the numeral.

Origin

Mid 19th century; earliest use found in The Monthly Review. From acro- + -phonic.

Pronunciation:

acrophonic

/ˌakrəˈfɒnɪk/