Noun
cross cousin (plural cross cousins)
The child of a maternal uncle or of a paternal aunt
cross-cousin (plural cross-cousins)
(anthropology) The child of one's father's sister or of one's mother's brother; a cousin related via opposite-gender siblings rather than same-gender ones (the latter being a parallel cousin).
Many societies forbid marriage between parallel cousins, but encourage marriage between cross-cousins or second cross-cousins.
cross-cousin