1 OSTR
m. [prob. identical with jastr, the Engl. yeast, dropping the initial j; ostr is a word common to all the Scandin. languages (Dan.-Swed. ost), instead of the Saxon and Germ. cheese, cese (käse), which were no doubt borrowed from the Lat. caseus]:—cheese; slátr, skreið ok ostar, Háv. 53; smjör ok ost, Nj. 74; þeir höfðu skyr ok ost (of a supper) … hann bargsk lítt við ostinn, he went slowly on with the cheese, Eb. 244; þar vóru tveir diskar fram settir, þar var eitt skamrifs-stykki á diski hverjum ok forn ostr til gnægta, Fbr. 37; Geysu dætr skáru akkeri af osti, ok sögðu at þau mundi fullvel halda herskipum Haralds konungs …, Fms. vi. 253; konan hafði einn ostinn í brott, one cheese, Bs. i. 247; ef þeir selja ær til osts, Grág. ii. 309.
2 OSTR
COMPDS: ostfjórðungr, ostgjald, osthleifr, osthlutr, ostkista, osttíund, osttollr.