Definition of acrosticism in English:

acrosticism

noun

rare
  • The method of acrostics; acrostical arrangement or character.

Origin

Mid 19th century; earliest use found in Elizabeth Barrett Browning (1806–1861), poet and writer. From acrostic + -ism.

Pronunciation:

acrosticism

/əˈkrɒstɪsɪz(ə)m/