Any marine gastropod shell of the genus Monodonta. They are top-shaped, bright-coloured and pearly.

plural of rosary shell

4,5,6,7-tetrachloro-2',4',5',7'-tetraiodofluorescein, a stain whose sodium salt is commonly used in eyedrops to stain damaged cells and thereby identify damage.

plural of rosh yeshiva

A solid odourless substance which separates from rose oil.

A variety of hay fever, sometimes attributed to the inhalation of the effluvia of roses.

A machine, or an appendage to a turning lathe, by which a surface or wood, metal, etc., is engraved with a variety of curved lines.

roseola

A rich tint prepared from lac and madder precipitated on an earthy base.

A nail with a convex, faceted head.