— quinquennially , adv.
/kwin kwen"ee euhl, kwing-/ , adj.
1. of or lasting for five years.
2. occurring every five years.
n.
3. something that occurs every five years.
4. a fifth anniversary.
5. a five-year term in office.
6. a quinquennium.
[ 1425-75; late ME quinquenni ( s ) of five years + -AL 1 ]