leonine rhyme

n.
A form of internal rhyme in which the word preceding the caesura rhymes with the final word in the line, as in: "For the moon never beams without bringing me dreams" (Edgar Allan Poe).

[Probably after Leo and or Leonius, name of an unknown medieval poet.]

leonine rhyme, a form of internal rhyme in which a word or syllable (s) in the middle of a verse line rhymes with the final word or syllable(s) of the same line, as in the opening line of Edgar Allan Poe's ‘The Raven’ (1845):

Once upon a midnight dreary, while I pondered, weak and weary

The term was once restricted to a particular variety of such rhymes as used by medieval poets in Latin hexameters and pentameters, with the first rhyming word immediately preceding the medial caesura, but it now often refers to similar rhymes in other kinds of line.