What is the difference between a masculine caesura and a feminine caesura?
It depends on the preceding syllable.
A masculine caesura is a pause coming after a stressed syllable.
- Then there's a pair of us // -don't tell!
A feminine caesura comes after an unstressed syllable.
- I have three daugh ters; // the eldest is eleven
(Examples from I'm Nobody! Who Are You? by Emily Dickinson and Winter's Tale by William Shakespeare.)
Try this article for a more thorough explanation.