What is the difference between second cousin and first cousin once removed? Is "[ordinal] cousin once removed" generally used in English?
marked as duplicate by TimLymington, Kristina Lopez, Joel Brown, tchrist, Barrie England Jan 6 at 14:24
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
"Removed" here describes vertical as opposed to lateral relationship on the tree of life.