acrostic/əˈkrɔstɪk; ?@ -ˈkrɔ:s-; ə`krɔstɪk/ npoem or word-puzzle in which the first, or the first and last, letters of the lines form a word or words 离合诗; 离合字谜（数行诗句或文字的首字母或首尾字母能组合成词或词组者）.
牛津英汉双解词典