No definitions found for 'quaternian algebra'
Perhaps one of these:
quadrinomical,
quadroon,
qatari monetary unit,
quaternary ammonium compound,
quadrumanous,
quadrant of altitude,
quadrennium,
quaternary,
quaternary period,
quadrantal versor,
quaternion,
quadriennial,
quadrinomial,
quito orange,
quadrans,
quit rent,
quateron,
quadrinominal,
quadrantes,
quatern,
quadrennial,
quaternity,
quadriennium utile,
quadrantal,
quadrinodal,
quadrangular prism,
quadrangular,
quadrumana,
quadrantal triangle,
quadrumvirate,
quadrant,
quadrangle,
quadrantanopia,
quadrennially,
quatrain,
quadrangularly,
quadrumane,
quitrent,
quaternate,
quadrin