quadriad
[ kwod-ree-ad ]
/ ˈkwɒd riˌæd /
noun
a group of four, especially a group of four persons with an interest or task in common.
Words nearby quadriad
quadrel,
quadrella,
quadrennial,
quadrennium,
quadri-,
quadriad,
quadribasic,
quadric,
quadric surface,
quadricentenary,
quadricentennial