clerihew , n :
A humorous rhyme of four lines with the rhyming scheme AABB, usually regarding a person mentioned in the first line. English humourist and novelist Edmund Clerihew Bentley, who invented the clerihew, died on this day in 1956.
Source http://handbookblogger.blogspot.com/2018/03/clerihew-word-of-day-for-march-30-2018.html