primer seisin
noun
prim·er seisin
ˈprimə(r),
-īmə(r)-
: a right of the crown to exact from the heir of a tenant in capite seised of a knight's fee one year's profits of the land in addition to the ordinary relief if the lands were in immediate possession or half a year's profits if the lands were in reversion expectant on a life estate
Word History
Etymology
Middle English primer cession, primer season, from primer entry 2 + cession, season, alteration of seisine seisin