(organic chemistry) arbutin

(archaic) Any of several species of eared seal, but especially the northern fur seal, Callorhinus ursinus

plural of ursine seal

plural of ursal

plural of ursane

Primordial soup; the protoplasm from which all life originated, according to a theory of the German biologist Ernst Haeckel.

A surname from Spanish [in turn from Basque].

plural of ursine

(organic chemistry) A triterpene present in the chestnut Castanea sativa

(rare) plural of urstromtal