The term 'Keatsian or Horatian' refers to two different styles of poetry. Keatsian poetry is characterized by its focus on beauty, emotion, and the senses, while Horatian poetry is more focused on satire and wit. The crossword solution for this term is ODIC, which stands for ode, a type of poem that is often associated with both Keatsian and Horatian styles. An ode is a lyrical poem that is usually written in praise of something or someone, and it often follows a specific structure.