[ uh-krof-uh-nee ]
/ əˈkrɒf ə ni /

noun, plural a·croph·o·nies.

the use of what was originally a logogram as a phonetic symbol for the initial sound of the word the logogram represented, as, in Semitic writing, the use of a picture of a shepherd's crook to represent the sound (l), the first sound of lamed, the Hebrew word for a shepherd's crook.
the use of a word as the name of the alphabetical symbol representing the initial sound of that word.
Also acrology.

Origin of acrophony

First recorded in 1880–85; acro- + -phony


ac·ro·phon·ic [ak-ruh-fon-ik] /ˌæk rəˈfɒn ɪk/, ac·ro·pho·net·ic [ak-ruh-fuh-net-ik] /ˌæk rə fəˈnɛt ɪk/, adjectiveac·ro·phon·i·cal·ly, ac·ro·pho·net·i·cal·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020